frameworks/native: Add support for transparent layers

Add support for marking layers transparent, which SurfaceFlinger
can drop from composition. This is meant to be set by apps, in
situations where the window above a surfaceview is fully transparent.

Change-Id: Ide979d47489a6fc4c6f47f6dd026853d83d484c0
frameworks/native: add ambient temperature & relative humidity sensor features

Adding ambient temperature & relative humidity hardware sensor
features as they are missing and causing CTS failures.

Change-Id: I4f07db8e77cb77c5b2c1bb7ed80a26f68c91c23e
Merge "frameworks/native: Add support for transparent layers"
Merge "frameworks/native: add ambient temperature & relative humidity sensor features"
Merge pull request #2 from AOSParadox/LA.BF.1.1.2_rb1.7

CAF UPDATE : LA.BF.1.1.2_rb1.7