doc(nc-android): add notes for AAB build

nym-connect/native/android/README.md

@@ -37,7 +37,7 @@ RELEASE=true ./build-android.sh aarch64 x86_64
 The shared library for each ABIs will be automatically moved into
 `app/src/main/jniLibs/*` directories.
 
-### APK build (from terminal)
+### APK/AAB build (from terminal)
 
 This project is setup with multiple [product flavors](app/build.gradle) to
 build for specific architectures.\
@@ -48,12 +48,18 @@ Supported archs:
 - x86_64
 - x86
 
-For example to build for _arm64_ in _release_ mode use
+For example to build an APK for _arm64_ in _release_ mode use
 
 ```shell
 ./gradlew :app:assembleArm64Release
 ```
 
+Instead of building an APK, to build an app bundle (`.aab`) run
+
+```shell
+./gradlew :app:bundleArm64Release
+```
+
 **NOTE**: you likely want _arch64_ (`arm64` & `x86_64`) for APK distribution
 
 To build a _universal_ APK which includes all ABI use

nym-connect/native/android/app/build.gradle.kts

@@ -22,6 +22,18 @@ android {
         }
     }
 
+    bundle {
+        language {
+            enableSplit = true
+        }
+        density {
+            enableSplit = true
+        }
+        abi {
+            enableSplit = true
+        }
+    }
+
     buildTypes {
         release {
             isMinifyEnabled = true