Change app id based on current git branch

This enables to install multiple builds from different branches at once

app/build.gradle

@@ -9,6 +9,7 @@ android {
 
     defaultConfig {
         applicationId "org.schabi.newpipe"
+        resValue "string", "app_name", "NewPipe"
         minSdkVersion 19
         targetSdkVersion 28
         versionCode 840
@@ -28,7 +29,15 @@ android {
         debug {
             multiDexEnabled true
             debuggable true
-            applicationIdSuffix ".debug"
+
+            def workingBranch = "git rev-parse --abbrev-ref HEAD".execute().text.trim()
+            if (workingBranch.isEmpty() || workingBranch == "master" || workingBranch == "dev") {
+                applicationIdSuffix ".debug"
+                resValue "string", "app_name", "NewPipe Debug"
+            } else {
+                applicationIdSuffix ".debug." + workingBranch.replaceAll("[^A-Za-z]+", "")
+                resValue "string", "app_name", "NewPipe " + workingBranch
+            }
         }
     }
 

app/src/debug/AndroidManifest.xml

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
-    package="org.schabi.newpipe">
-
-    <application
-        android:name=".DebugApp"
-        android:label="NewPipe Debug"
-        tools:replace="android:name, android:label">
-        <activity
-            android:name=".MainActivity"
-            android:label="NewPipe Debug"
-            tools:replace="android:label"/>
-    </application>
-
-</manifest>

app/src/main/res/values/strings.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name" translatable="false">NewPipe</string>
     <string name="main_bg_subtitle">Tap \"Search\" to get started</string>
     <string name="view_count_text">%1$s views</string>
     <string name="upload_date_text">Published on %1$s</string>