Accessible IPTV Client for Android 0.2.10

Playback can start with half a second buffered instead of two seconds, reducing the wait when opening a channel. Hardware testing confirmed the faster start.

Live playback still builds the 25-second cushion during playback for every provider, with the existing 30-second default maximum. Recovery after a stall still waits for the full cushion. Provider connection delays and video keyframes can still affect startup.

Verified: all 142 Android unit and Robolectric tests passed; debug and signed release APKs built successfully. This APK uses the owner's existing signing key for in-app updates.