build: allow obfuscation in play store release to further optimize app

app/build.gradle.kts

@@ -57,9 +57,6 @@ android {
         release {
             isMinifyEnabled = true
             isShrinkResources = true
-            proguardFiles(
-                getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro"
-            )
         }
         debug {
             applicationIdSuffix = ".debug"
@@ -71,10 +68,16 @@ android {
         create("foss") {
             dimension = "version"
             isDefault = true
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules-foss.pro"
+            )
         }
         create("play") {
             dimension = "version"
             versionNameSuffix = "-play"
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules-play.pro"
+            )
         }
     }
 

app/proguard-rules-play.pro

@@ -0,0 +1,21 @@
+# 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