RTSP: increase mCheckGeneration when mCheckPending is set to false.

This will ensure there is only one 'chek' message.
Also delay notification of seek done till kWhatSeekDone, instead of
kWhatSeekPaused. This allows back-to-back multiple seeks.

Bug: 25727912
Change-Id: If873bfaf1c37790e520f1f659ab26148b0c8cd1c
2 files changed