Set default frameTimelinesLength to 1

The default FrameTimeline has some default values.
This is to account for Choreographer MSG_DO_FRAME case, which creates
a default VsyncEventData since it only uses frame time.

Bug: 285093700
Bug: 286928743
Test: Set USE_VSYNC to false
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:88691bea18b94b42052e993f69714ff327647c7e)
Merged-In: I3b3274470101ed77e6718c5882ac9c59125a50b8
Change-Id: I3b3274470101ed77e6718c5882ac9c59125a50b8