Workaround for Resources$NotFoundException on Android 4

```
3-12 09:53:47.234 2271-2271/it.niedermann.nextcloud.deck E/AndroidRuntime: FATAL EXCEPTION: main
    android.content.res.Resources$NotFoundException: File res/drawable/ic_view_column_black_24dp.xml from drawable resource ID #0x7f07007b. If the resource you are trying to use is a vector resource, you may be referencing it in an unsupported way. See AppCompatDelegate.setCompatVectorFromResourcesEnabled() for more info.
        at android.content.res.Resources.loadDrawable(Resources.java:1928)
        at android.content.res.Resources.getDrawable(Resources.java:664)
        at androidx.core.content.ContextCompat.getDrawable(ContextCompat.java:479)
        at it.niedermann.nextcloud.deck.ui.MainActivity.buildSidenavMenu(MainActivity.java:187)
        at it.niedermann.nextcloud.deck.ui.MainActivity.access$100(MainActivity.java:45)
        at it.niedermann.nextcloud.deck.ui.MainActivity$1.lambda$null$0(MainActivity.java:157)
        at it.niedermann.nextcloud.deck.ui.-$$Lambda$MainActivity$1$fjUtebZdN0tro2_UplyAlWSvn7E.onChanged(lambda)
        at androidx.lifecycle.LiveData.considerNotify(LiveData.java:113)
        at androidx.lifecycle.LiveData.dispatchingValue(LiveData.java:131)
        at androidx.lifecycle.LiveData.setValue(LiveData.java:289)
        at androidx.lifecycle.MutableLiveData.setValue(MutableLiveData.java:33)
        at androidx.lifecycle.LiveData$1.run(LiveData.java:91)
        at android.os.Handler.handleCallback(Handler.java:605)
        at android.os.Handler.dispatchMessage(Handler.java:92)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:4424)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
        at dalvik.system.NativeStart.main(Native Method)
     Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #1: invalid drawable tag vector
        at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:863)
        at android.graphics.drawable.Drawable.createFromXml(Drawable.java:804)
        at android.content.res.Resources.loadDrawable(Resources.java:1925)
        at android.content.res.Resources.getDrawable(Resources.java:664) 
        at androidx.core.content.ContextCompat.getDrawable(ContextCompat.java:479) 
        at it.niedermann.nextcloud.deck.ui.MainActivity.buildSidenavMenu(MainActivity.java:187) 
        at it.niedermann.nextcloud.deck.ui.MainActivity.access$100(MainActivity.java:45) 
        at it.niedermann.nextcloud.deck.ui.MainActivity$1.lambda$null$0(MainActivity.java:157) 
        at it.niedermann.nextcloud.deck.ui.-$$Lambda$MainActivity$1$fjUtebZdN0tro2_UplyAlWSvn7E.onChanged(lambda) 
        at androidx.lifecycle.LiveData.considerNotify(LiveData.java:113) 
        at androidx.lifecycle.LiveData.dispatchingValue(LiveData.java:131) 
        at androidx.lifecycle.LiveData.setValue(LiveData.java:289) 
        at androidx.lifecycle.MutableLiveData.setValue(MutableLiveData.java:33) 
        at androidx.lifecycle.LiveData$1.run(LiveData.java:91) 
        at android.os.Handler.handleCallback(Handler.java:605) 
        at android.os.Handler.dispatchMessage(Handler.java:92) 
        at android.os.Looper.loop(Looper.java:137) 
        at android.app.ActivityThread.main(ActivityThread.java:4424)
```

2 files changed, 16 insertions, 13 deletions

diff --git a/app/src/main/java/it/niedermann/nextcloud/deck/ui/MainActivity.java b/app/src/main/java/it/niedermann/nextcloud/deck/ui/MainActivity.java
index c5fdae8bb..c1baef723 100644
--- a/app/src/main/java/it/niedermann/nextcloud/deck/ui/MainActivity.java
+++ b/app/src/main/java/it/niedermann/nextcloud/deck/ui/MainActivity.java
@@ -4,28 +4,29 @@ import android.content.Intent;
 import android.graphics.Color;
 import android.graphics.drawable.Drawable;
 import android.os.Bundle;
-import androidx.annotation.NonNull;
-import com.google.android.material.floatingactionbutton.FloatingActionButton;
-import com.google.android.material.navigation.NavigationView;
-import com.google.android.material.snackbar.Snackbar;
-import com.google.android.material.tabs.TabLayout;
-import androidx.core.graphics.drawable.DrawableCompat;
-import androidx.core.view.GravityCompat;
-import androidx.viewpager.widget.ViewPager;
-import androidx.drawerlayout.widget.DrawerLayout;
-import androidx.appcompat.app.ActionBarDrawerToggle;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.Toolbar;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.SubMenu;
 import android.view.View;
 
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.navigation.NavigationView;
+import com.google.android.material.snackbar.Snackbar;
+import com.google.android.material.tabs.TabLayout;
 import com.nextcloud.android.sso.helper.SingleAccountHelper;
 import com.nextcloud.android.sso.model.SingleSignOnAccount;
 
 import java.util.List;
 
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.ActionBarDrawerToggle;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatDelegate;
+import androidx.appcompat.widget.Toolbar;
+import androidx.core.graphics.drawable.DrawableCompat;
+import androidx.core.view.GravityCompat;
+import androidx.drawerlayout.widget.DrawerLayout;
+import androidx.viewpager.widget.ViewPager;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import it.niedermann.nextcloud.deck.R;
@@ -75,6 +76,8 @@ public class MainActivity extends AppCompatActivity
         syncManager = new SyncManager(getApplicationContext(), this);
         stackAdapter = new StackAdapter(getSupportFragmentManager());
 
+        AppCompatDelegate.setCompatVectorFromResourcesEnabled(true);
+
         //TODO replace nulls
         new CrossTabDragAndDrop().register(this, viewPager, null, null);
 
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 2653e10e5..57dafac35 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -65,6 +65,6 @@
         android:layout_height="match_parent"
         android:layout_gravity="start"
         android:fitsSystemWindows="false"
-        app:headerLayout="@layout/nav_header_main"></com.google.android.material.navigation.NavigationView>
+        app:headerLayout="@layout/nav_header_main" />
 
 </androidx.drawerlayout.widget.DrawerLayout>