Remove previous workaround for setColorMode to WCG

In previous CL ag/4296212, that fix is to workaround from jank while
setColorMode on some specific chipset. By check on current Android,
the app won't switch color mode during launch anymore, also that
chipset should already phase out.

Bug: 284449462
Test: atest ActivityTransitionTests
Test: open/close photos in WCG, verify no jank
Change-Id: I13d6115a6319131c786161632c0c055b3c4f2353