Add Display.getPreferredWideGamutColorSpace().

Add Display.getPreferredWideGamutColorSpace() to return the preferred wide
color space that the rendering and composition pipeline prefers.

BUG: 120904891
Test: atest android.display.cts.DisplayTest#testGetPreferredWideGamutColorSpace
Change-Id: I1bcd9db72689a734b2a7c097b99a01464810994a
5 files changed