Let's flush data and checkpoint 2 secs for TV

This rolls back the previous low.ram change [1], which is now uncessary as we
have ro.config.batteryless newly.

[1] e86ef01a ("Reduce the checkpoint duration to 30secs")

Bug: 373958222
Bug: 410100970
Bug: 288068123
Change-Id: I548ddedea50dd4f9b8accd7f9cad750101cda45b
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>