Apply Hdr transition rate only when cap is changed

Bug: b/333865835
Test: manual testing, atest HdrClamperTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:419b9bc164c5c66f249e809b8812e7bfc51c473e)
Merged-In: Idb9d24f4555b757be81cca4ce80fb14a1b321da5
Change-Id: Idb9d24f4555b757be81cca4ce80fb14a1b321da5
4 files changed