Move update3aregion, validate3aRegion and some StaticMetadata utils to CtsCameraUtils lib.

Bug: 199300149

Test: atest CaptureRequestTest.java#testDigitalZoom

Merged-In: Ie3c96828b53ef359461eb5845bdedc936eeac209
Change-Id: Ie3c96828b53ef359461eb5845bdedc936eeac209
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>
(cherry picked from commit aabd92ec8ad799a8d095e438d3db45b5282abbef)
3 files changed