hwc: Add MetaData support in overlay path.

DONE:
    1. HSIC(SPA) test.
    2. IGC R/G/B channel test.
    3. QSEED2 sharpening/smooth test verified through register value check.

Change-Id: Ia9472f489c013df22a3411eeaac3c8d1e6e22ac0
12 files changed