feat(player): add runtime decoder mode switcher

[anilbeesetti]

Summary

• add HW+, HW, and SW decoder switching from player controls without recreating ExoPlayer
• keep video/audio renderer selection aligned with the chosen mode and support optional HW+ audio fallback in SW mode
• silently recover default HW+ failures with SW, while explicit unsupported selections require confirmation
• detect unsupported and unmapped video tracks, expose exhausted recovery through the existing error dialog, and log actual decoder analytics

Testing

• ./gradlew :feature:player:ktlintCheck :feature:player:testDebugUnitTest :app:assembleDebug --console=plain
• emulator-5554: HW+, HW, SW decoder initialization
• emulator-5554: silent HW+ to SW fallback with MPEG-2 4:2:2
• emulator-5554: explicit HW to SW and SW to HW+ confirmation recovery
• emulator-5554: HW+ to HW position preservation and same-player media transition reset
• emulator-5554: one ExoPlayer instance and empty crash log