Fix cancellation of copy jobs.

Add FLAG_CANCEL_CURRENT to the pending intent for cancellation, to
prevent reuse of previously created cancellation intents.  Previously
created intents have non-matching job IDs, which causes the cancellation
intent to be ignored.

BUG=20221969

Change-Id: Ie0afcc6af53a550b44bc4b2f3d48942cdb092a65
1 file changed