android: optimize build settings and remove x86_64 support

- Enable resource shrinking for release builds
- Disable JNI debugging in release builds
- Switch to optimized proguard configuration file
- Remove x86_64 ABI support
- Fix syntax error in dependencies block
- Update build optimization flags:
  * Enable shrinkResources
  * Use proguard-android-optimize.txt
  * Disable JNI debugging for release builds

These changes improve the release build optimization and reduce
APK size by removing x86_64 support and enabling additional
resource optimization features. The build configuration is also
cleaned up by fixing a syntax error and using more aggressive
optimization settings.

src/android/app/build.gradle.kts

@@ -106,10 +106,12 @@ android {
 
             resValue("string", "app_name_suffixed", "Citron")
             isDefault = true
+            isShrinkResources = true
             isMinifyEnabled = true
+            isJniDebuggable = false
             isDebuggable = false
             proguardFiles(
-                getDefaultProguardFile("proguard-android.txt"),
+                getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"
             )
         }
@@ -122,7 +124,7 @@ android {
             isMinifyEnabled = true
             isDebuggable = true
             proguardFiles(
-                getDefaultProguardFile("proguard-android.txt"),
+                getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"
             )
             versionNameSuffix = "-relWithDebInfo"
@@ -181,7 +183,7 @@ android {
                     "-DANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES=ON"
                 )
 
-                abiFilters("arm64-v8a", "x86_64")
+                abiFilters("arm64-v8a") // , "x86_64")
             }
         }
     }
@@ -250,8 +252,6 @@ dependencies {
     // Third Party Libraries
     implementation("io.coil-kt:coil:2.2.2")
     implementation("info.debatty:java-string-similarity:2.0.0")
-
-]]
 }
 
 fun runGitCommand(command: List<String>): String {