Cleanup using AndroidStudio analyze.

src/main/res/drawable/ic_help_24dp.xml

@@ -2,7 +2,8 @@
     android:width="24dp"
     android:height="24dp"
     android:viewportWidth="24"
-    android:viewportHeight="24">
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal">
     <path
         android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM13,19h-2v-2h2v2zM15.07,11.25l-0.9,0.92C13.45,12.9 13,13.5 13,15h-2v-0.5c0,-1.1 0.45,-2.1 1.17,-2.83l1.24,-1.26c0.37,-0.36 0.59,-0.86 0.59,-1.41 0,-1.1 -0.9,-2 -2,-2s-2,0.9 -2,2L8,9c0,-2.21 1.79,-4 4,-4s4,1.79 4,4c0,0.88 -0.36,1.68 -0.93,2.25z"
         android:fillColor="#000000" />

src/main/res/layout/help.xml

@@ -12,7 +12,7 @@
         <com.google.android.material.appbar.MaterialToolbar
             android:layout_width="match_parent"
             android:layout_height="?attr/actionBarSize"
-            app:navigationIcon="@drawable/ic_help_black_24dp"
+            app:navigationIcon="@drawable/ic_help_24dp"
             app:title="@string/menu_help" />
     </com.google.android.material.appbar.AppBarLayout>
 

src/main/res/menu/track_list.xml

@@ -32,7 +32,7 @@ limitations under the License.
         android:title="@string/menu_settings" />
     <item
         android:id="@+id/track_list_help"
-        android:icon="@drawable/ic_help_black_24dp"
+        android:icon="@drawable/ic_help_24dp"
         android:title="@string/menu_help" />
 
 </menu>