feat(mobile): improve android edgeless & ci (#15118)

#### PR Dependency Tree


* **PR #15118** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Chores**
* Improved mobile CI workflow with change-aware Android/iOS build jobs
and updated completion dependencies so tests wait for the relevant
mobile builds.
* **Performance / App Behavior**
* Enhanced Android WebView behavior: improved viewport/WebView tuning,
disabled zoom and scrollbars, and made mixed-content allowance
environment-aware (debug vs non-debug).
* Adjusted Android cleartext traffic handling based on build/debug
settings and Capacitor server URL configuration.
* **Tests**
* Strengthened Electron BYOK storage tests with per-test temporary
directories, mock control, and added coverage for when secure storage is
unavailable.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/apps/android/App/app/build.gradle

@@ -27,6 +27,7 @@ android {
         versionCode 1
         versionName System.getenv('VERSION_NAME') ?: 'v1.0.0-local'
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        manifestPlaceholders = [usesCleartextTraffic: "false"]
         aaptOptions {
             // Files and dirs to omit from the packaged assets dir, modified to accommodate modern web apps.
             // Default: https://android.googlesource.com/platform/frameworks/base/+/282e181b58cf72b6ca770dc7ca5f91f135444502/tools/aapt/AaptAssets.cpp#61
@@ -49,6 +50,7 @@ android {
         debug {
             minifyEnabled false
             debuggable true
+            manifestPlaceholders = [usesCleartextTraffic: "true"]
         }
     }
     flavorDimensions = ['chanel']