Stable Updates 20250822 (#1262)

Fixes: #1261

This PR resolves critical dependency resolution issues that were
preventing the successful build of the stable updates for August 22,
2025. The main fix addresses the
`com.google.j2objc:j2objc-annotations` version issue identified in
previous builds.

## Key Fixes

### Dependency Resolution Issues

- **Fixed `com.google.j2objc:j2objc-annotations` version from "3.1.0"
  to "3.1"** - The 3.1.0 version doesn't exist in Maven Central,
  causing 404 errors during artifact downloads
- **Added missing Compose 1.9.0 dependencies** - Added
  `androidx.compose.runtime:runtime-annotation*` packages required by
  the updated Compose libraries
- **Added missing SavedState dependency** - Added
  `androidx.savedstate:savedstate-compose` package for proper
  SavedState integration
- **Fixed Android.Gms.Ads APIs loss** - Reverted
  play-services-ads-lite from version 24.3.0 to 24.0.0 as version
  24.3.0 was an empty stub library

### Build Process Improvements

- Successfully resolved all dependency conflicts during the binderate
  step
- Enabled successful processing of 600+ Maven artifacts
- Generated and committed PublicAPI changes for updated libraries
- Updated namespace verification file to reflect new package structure
- Completed full library build to regenerate all PublicAPI.*.txt files

## Generated PublicAPI Changes

The fix enables successful generation of API surface documentation for
major version updates:

- **gRPC API 1.75.0**: New `Xamarin.Grpc.Attributes`,
  `CallCredentials`, `BinaryLog` APIs
- **AndroidX Core**: New notification side channel interfaces and
  Kotlin extensions  
- **Google MediaPipe**: Updated task-genai APIs
- **Protocol Buffers**: Updated JavaLite APIs
- **Android.Gms.Ads**: Restored 1,474+ API entries that were lost due
  to empty stub library

## Major Version Updates Now Building Successfully

- AndroidX Compose Libraries: 1.8.3 → 1.9.0
- gRPC Libraries: 1.74.0 → 1.75.0  
- Kotlin Libraries: 2.2.0 → 2.2.10

## Namespace Updates

The `published-namespaces.txt` file has been updated to reflect the
current package structure, including the addition of new
`AndroidX.Core.Flagging` namespace and restoration of all
Android.Gms.Ads namespaces after reverting play-services-ads-lite to
the working version.

This resolves the build failures and dependency resolution issues that
were blocking the stable updates process.

Co-authored-by: sheiksyedm <[email protected]>
Co-authored-by: Jonathan Peppers <[email protected]>

Author: 3 people

.gitignore

@@ -444,3 +444,4 @@ lint/generated/
 lint/outputs/
 lint/tmp/
 # lint/reports/
+config.json.backup