Update Android build configuration: change React Native architectures and bump version name to 1.81.4

Author: sunnylqm

Example/testHotUpdate/android/app/build.gradle

@@ -81,7 +81,7 @@ android {
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
         versionCode 1
-        versionName "1.0"
+        versionName "1.81.4"
     }
     signingConfigs {
         debug {

Example/testHotUpdate/android/gradle.properties

@@ -25,7 +25,8 @@ android.useAndroidX=true
 # Use this property to specify which architecture you want to build.
 # You can also override it from the CLI using
 # ./gradlew <task> -PreactNativeArchitectures=x86_64
-reactNativeArchitectures=armeabi-v7a,arm64-v8a,x86,x86_64
+# reactNativeArchitectures=armeabi-v7a,arm64-v8a,x86,x86_64
+reactNativeArchitectures=arm64-v8a
 
 # Use this property to enable support to the new architecture.
 # This will allow you to use TurboModules and the Fabric render in