[SF] Use render rate for the compositorTiming

Vsync Period does not represent the actual
composition rate in the framework anymore,
render rate is the more accurate composition rate.

BUG: 383938139
BUG: 355342197
Flag: EXEMPT bug fix
Test: atest CtsDeqpTestCases --test-filter '*dEQP-EGL.functional.get_frame_timestamps*'
Test: Before fix http://ab/I51300010353712246
Test: After the fix http://ab/I22500010354940353
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:6b6d542c5c002e2247aacdb1aec79868c0c4a809)
Merged-In: I33574b3ff347264a19e2e0bcfd2236639aad01a5
Change-Id: I33574b3ff347264a19e2e0bcfd2236639aad01a5