The android timer class was not generating timer events correctly. This caused
renewal and expiration events not to be sent. A strong pointer to the
timer thread was not held and this caused the android util timer
thread to exit after firing once. This is now addressed.
Bug: 8736545
Merge of https://widevine-internal-review.googlesource.com/#/c/5353/
from the Widevine CDM repository.
Change-Id: I2d904e55d4d10eacc1a51f1c6b5c1a267c92c8d8
