Protect REFRESH_BATCHED_SCAN broadcast

Bug: 29754520
Test: cherry-pick from internal tree
Change-Id: Id3f43d36db2c5f026a5d3a94e7370051d2e23e37
(cherry picked from commit 58dd0cd65e7ac9ca0c9ccbf42087baf2df751c61)
1 file changed