feat: export all generated API types and add E2E tests for 139 scenarios

Update YAML specs to use exported go_type names (e.g., wifiManager -> Manager),
making all 53 Android API packages expose clean, idiomatic Go APIs. Add missing
obtain/service_name entries for packages that lacked factory functions (nsd,
download, biometric, usb, player). Add missing methods to specs (pm.HasSystemFeature,
vibrator.HasVibrator, preferences.GetString/Contains).

Add handwritten factories and helpers:
- bluetooth.NewAdapter (via BluetoothManager.getAdapter)
- omapi.NewService, speech.NewTTS (no-arg constructors)
- app.NewIntent, app.ExtractBundle, alarm.ExtractalarmClockInfo
- build.GetBuildInfo/GetVersionInfo (static field readers)
- location.ExtractLocation (lat/lng/provider extraction)
- app.Context.PackageManager() and ContentResolver()

Update E2E test harness to include GoAbstractDispatch class. Fix E2E tests
for updated API signatures. Update tool tests (grpcgen, javagen, protogen)
for new type names.

Verified: 139/139 E2E tests pass on both Pixel 8a (Android 16, API 36,
arm64-v8a) and emulator (Android 15, API 35, x86_64). All host unit tests
and tool tests pass.

Author: xaionaro@dx.center