Stop using HWUI callbacks for jank.

Removes skipping of frames tagged as "first frame" by HWUI for jank and
stops registering the HardwareRendererObserver if the HWUI callback is
not needed for anything.

Bug: b/354763298
Test: FrameworksCoreTests manual
Flag: com.android.internal.jank.ignore_hwui_is_first_frame
Change-Id: I83c6bbaba5e21cadff5b34f87fa51ede42b31800