With the OSS camera HAL, the camera preview freezes every time
a picture is taken. Restart the preview to unfreeze it.
Change-Id: If0fd6a1fcb01eccc4cf7f1abc548dcb92e9546b1
Somehow stock doesn't enable this overlay, which means that
LTE is enabled some other way.
AFAIK, Redmi 3S should be LTE-compatible across all models,
so let's just enable it until something else crops up.
Change-Id: I6be4522b95750e6c31fbc54e435e32f0101b47c7