Change BinderLatencyBuckets to use int[] instead of ArrayList to improve

performance.

Cherry pick from master with no changes

Test: unit test
Bug: 179999191
Change-Id: Id996b52b5cb69a85f9c6a932ea8d30336fcaf12a
Merged-In: Id996b52b5cb69a85f9c6a932ea8d30336fcaf12a
(cherry picked from commit 9d02e610)