Clean up compatibility support code

app/proguard-rules.pro

@@ -1,28 +1,7 @@
-# Add project specific ProGuard rules here.
-# You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
-
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
-
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
 -keepattributes SourceFile,LineNumberTable
-
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile
-
+-adaptresourcefilecontents META-INF/xposed/java_init.list
 -dontobfuscate
 
--keep class se.ajpanton.navbuttons.NavButtons
--keepclassmembers class se.ajpanton.navbuttons.NavButtons {
+-keep,allowoptimization,allowobfuscation public class * extends io.github.libxposed.api.XposedModule {
     public <init>();
 }