HTC M7/DeviceSettings: CS translation

- added Czech
- added XML header and copyright
- rebased and added missing

Change-Id: Ibd620b8f0171833cc15e3df27f68f457fb8f00bf
m7-common: Add low latency audio usecases

Change-Id: Ibd91e286d8b05d3aba65f2e8edebeb291297a9e4
m7-common: use low latency audio_policy.conf

Change-Id: I79e6af7c48d08b72815382a90480867d5819034b