Added throttle when reporting shortcut usage

Bug: 304290201
Test: manual
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:76121eb73d4c40829d5513b073871333520fe0a2)
Merged-In: I96370cbd4f6a55f894c1a93307e5f82dfd394652
Change-Id: I96370cbd4f6a55f894c1a93307e5f82dfd394652
4 files changed