Screenrecord: add blinking stop dot and low quality options

We could want to stop the recording without expanding the notification
panel and show sensitive info.
Long pressing on the red dot moves it to the opposite side,
in case the user wants not to cover specific elements on the screen.

Add also a low quality option that still gives a good recording
reducing a lot the final file size (useful when sharing the screenrecord
on data connections).

old commits ref:
https://github.com/ezio84/abc_frameworks_base/commit/6092d9ca8b0949d64c1b87d6cd53d66daf002e14
https://github.com/ezio84/abc_frameworks_base/commit/b50c7caf8b46c731093b11f5647028a23346f937
https://github.com/ezio84/abc_frameworks_base/commit/91c00e8fb70cb17b8658678bf476452f96cd44d1

Change-Id: If413241c3fa533650690cf3b7df5c05fb2f8c8ed