Remove bitmap drawables and let Android Studio generate the at build time

Tested on virtual Android 8.1, 5.0 and an API Level 14. 14 showed some visual glitches (Some minor parts of the icons are black) - But i think it's a good trade-off. Everything still works.

app/src/main/java/it/niedermann/owncloud/notes/android/activity/NotesListViewActivity.java

@@ -192,7 +192,7 @@ public class NotesListViewActivity extends AppCompatActivity implements ItemAdap
     }
 
     private void setupNavigationList(final String selectedItem) {
-        itemRecent = new NavigationAdapter.NavigationItem(ADAPTER_KEY_RECENT, getString(R.string.label_all_notes), null, R.drawable.ic_clock_grey600_24dp);
+        itemRecent = new NavigationAdapter.NavigationItem(ADAPTER_KEY_RECENT, getString(R.string.label_all_notes), null, R.drawable.ic_access_time_grey600_24dp);
         itemFavorites = new NavigationAdapter.NavigationItem(ADAPTER_KEY_STARRED, getString(R.string.label_favorites), null, R.drawable.ic_star_grey600_24dp);
         adapterCategories = new NavigationAdapter(new NavigationAdapter.ClickListener() {
             @Override

app/src/main/res/drawable/ic_access_time_grey600_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:tint="#757575" android:viewportHeight="24.0"
+    android:viewportWidth="24.0" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M11.99,2C6.47,2 2,6.48 2,12s4.47,10 9.99,10C17.52,22 22,17.52 22,12S17.52,2 11.99,2zM12,20c-4.42,0 -8,-3.58 -8,-8s3.58,-8 8,-8 8,3.58 8,8 -3.58,8 -8,8zM12.5,7H11v6l5.25,3.15 0.75,-1.23 -4.5,-2.67z"/>
+</vector>

app/src/main/res/drawable/ic_clear_white_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:tint="#FFFFFF" android:viewportHeight="24.0"
+    android:viewportWidth="24.0" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M19,6.41L17.59,5 12,10.59 6.41,5 5,6.41 10.59,12 5,17.59 6.41,19 12,13.41 17.59,19 19,17.59 13.41,12z"/>
+</vector>

app/src/main/res/drawable/ic_share_white_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:tint="#FFFFFF" android:viewportHeight="24.0"
+    android:viewportWidth="24.0" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M18,16.08c-0.76,0 -1.44,0.3 -1.96,0.77L8.91,12.7c0.05,-0.23 0.09,-0.46 0.09,-0.7s-0.04,-0.47 -0.09,-0.7l7.05,-4.11c0.54,0.5 1.25,0.81 2.04,0.81 1.66,0 3,-1.34 3,-3s-1.34,-3 -3,-3 -3,1.34 -3,3c0,0.24 0.04,0.47 0.09,0.7L8.04,9.81C7.5,9.31 6.79,9 6,9c-1.66,0 -3,1.34 -3,3s1.34,3 3,3c0.79,0 1.5,-0.31 2.04,-0.81l7.12,4.16c-0.05,0.21 -0.08,0.43 -0.08,0.65 0,1.61 1.31,2.92 2.92,2.92 1.61,0 2.92,-1.31 2.92,-2.92s-1.31,-2.92 -2.92,-2.92z"/>
+</vector>

app/src/main/res/menu/menu_list_context_single.xml

@@ -4,14 +4,14 @@
 
     <item
         android:id="@+id/menu_edit"
-        android:icon="@drawable/ic_action_edit"
+        android:icon="@drawable/ic_edit_white_24dp"
         android:orderInCategory="100"
         android:title="@string/simple_edit"
         app:showAsAction="ifRoom" />
     <item
         android:id="@+id/menu_share"
         android:actionProviderClass="android.widget.ShareActionProvider"
-        android:icon="@drawable/ic_action_share"
+        android:icon="@drawable/ic_share_white_24dp"
         android:title="@string/menu_share"
         app:showAsAction="ifRoom" />
     <item

app/src/main/res/menu/menu_menu_create.xml

@@ -1,18 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<menu xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto">
-
-    <item
-        android:id="@+id/action_create_cancel"
-        android:icon="@drawable/ic_action_cancel"
-        android:orderInCategory="90"
-        android:title="@string/simple_cancel"
-        app:showAsAction="ifRoom" />
-
-    <item
-        android:id="@+id/action_create_save"
-        android:icon="@drawable/ic_action_done"
-        android:orderInCategory="90"
-        android:title="@string/action_create_save"
-        app:showAsAction="ifRoom" />
-</menu>

app/src/main/res/menu/menu_note_fragment.xml

@@ -14,14 +14,14 @@
         app:showAsAction="ifRoom" />
     <item
         android:id="@+id/menu_share"
-        android:icon="@drawable/ic_action_share"
+        android:icon="@drawable/ic_share_white_24dp"
         android:orderInCategory="100"
         android:title="@string/menu_share"
         app:showAsAction="never"
         app:actionProviderClass="android.support.v7.widget.ShareActionProvider" />
     <item
         android:id="@+id/menu_cancel"
-        android:icon="@drawable/ic_action_cancel"
+        android:icon="@drawable/ic_clear_white_24dp"
         android:orderInCategory="110"
         android:title="@string/simple_cancel"
         app:showAsAction="never" />