Add summary and footer message for the ScreenResolutionFragment.

Bug: b/199559703
Test: Check resolution switch UI in Settings app
      atest SettingsUnitTests:ScreenResolutionControllerTest
      atest SettingsUnitTests:ScreenResolutionFragmentTest
Change-Id: Iee1e74d3d4de81500b2abe62bc7e9bd69f55452c
(cherry picked from commit d633cd6b)
Merged-In: Iee1e74d3d4de81500b2abe62bc7e9bd69f55452c