chore(docs): update LO example readme

Added release APK installation steps

Author: ttypic

examples/README.md

@@ -19,7 +19,7 @@ Add your Ably key to the `local.properties` file:
 ```properties
 sdk.dir=/path/to/android/sdk
 
-ABLY_KEY=xxxx:yyyyyy
+EXAMPLES_ABLY_KEY=xxxx:yyyyyy
 ```
 
 ## Steps to Run the App
@@ -66,6 +66,41 @@ The app opens with two tabs:
 
 To see the real-time synchronization in action, run the app on multiple devices or emulators with the same Ably key.
 
+## Building release APK
+
+This is useful to check ProGuard rules, app size, etc. 
+
+1. Create signing keys for the Android app
+
+```shell
+keytool -genkey -v -keystore release.keystore \
+-storepass <store-password> \
+-alias <key-alias> \
+-keypass <key-password> \
+-keyalg RSA -keysize 2048 -validity 25000 -dname "CN=Ably Example App,OU=Examples,O=Ably,L=London,ST=England,C=GB"
+```
+
+2. Update `local.properties` file:
+
+```properties
+RELEASE_STORE_FILE=/absolute/path/to/release.keystore
+RELEASE_STORE_PASSWORD=<store-password>
+RELEASE_KEY_ALIAS=<key-alias>
+RELEASE_KEY_PASSWORD=<key-password>
+```
+
+3. Build release APK
+
+```shell
+./gradlew :examples:assembleRelease 
+```
+
+4. Install to the device
+
+```shell
+adb install -r examples/build/outputs/apk/release/examples-release.apk 
+```
+
 ## Troubleshooting
 
 - SDK Not Found: Install missing SDK versions from File > Settings > Appearance & Behavior > System Settings > Android SDK.

examples/build.gradle.kts

@@ -21,13 +21,25 @@ android {
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
 
-        buildConfigField("String", "ABLY_KEY", "\"${getLocalProperty("ABLY_KEY") ?: ""}\"")
+        buildConfigField("String", "ABLY_KEY", "\"${getLocalProperty("EXAMPLES_ABLY_KEY") ?: ""}\"")
     }
 
     buildTypes {
         release {
-            isMinifyEnabled = false
+            isMinifyEnabled = true
+            isShrinkResources = true
+
             proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+
+            val keystorePath = getLocalProperty("EXAMPLES_STORE_FILE")
+            keystorePath?.let {
+                signingConfig = signingConfigs.create("release") {
+                    keyAlias = getLocalProperty("EXAMPLES_KEY_ALIAS")
+                    keyPassword = getLocalProperty("EXAMPLES_KEY_PASSWORD")
+                    storeFile = file(it)
+                    storePassword = getLocalProperty("EXAMPLES_STORE_PASSWORD")
+                }
+            }
         }
     }
     compileOptions {