adding core and fdroid build flavors

app/build.gradle

@@ -46,6 +46,12 @@ android {
         }
     }
 
+    flavorDimensions "variants"
+    productFlavors {
+        core {}
+        fdroid {}
+    }
+
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
@@ -54,16 +60,6 @@ android {
         checkReleaseBuilds false
         abortOnError false
     }
-
-    compileOptions {
-        sourceCompatibility = 1.8
-        targetCompatibility = 1.8
-    }
-
-    kotlinOptions {
-        jvmTarget = "1.8"
-        freeCompilerArgs = ["-XXLanguage:+NewInference"]
-    }
 }
 
 dependencies {

app/src/fdroid/res/values/bools.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <bool name="show_donate_in_about">true</bool>
+</resources>

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

@@ -1,9 +1,9 @@
 <?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">
+    xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/cab_delete"
         android:icon="@drawable/ic_delete_vector"
         android:title="@string/delete"
-        app:showAsAction="ifRoom"/>
+        app:showAsAction="ifRoom" />
 </menu>

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

@@ -1,9 +1,9 @@
 <?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">
+    xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/cab_delete"
         android:icon="@drawable/ic_delete_vector"
         android:title="@string/delete"
-        app:showAsAction="ifRoom"/>
+        app:showAsAction="ifRoom" />
 </menu>