Submerge 3.7.5

- Playback with hardware decoding on the GPU for H.264 and H.265 (HEVC) video tracks.
- Playback with hardware decoding also works for containers like .MKV (Matroska)
- Playback with hardware decoding saves battery life and CPU cycles.
- Easily plays 4K video when hardware decoding is available.
- Time offset for subtitles now works again.