Un-expose LISTEN_ALWAYS_REPORTED_SIGNAL_STRENGTH for R.

Test: TH
Bug: 147322848
Merged-in: Ie8e4842264eb47e09397c9e56355d00c732c86c1
Change-Id: Ie8e4842264eb47e09397c9e56355d00c732c86c1
(cherry picked from commit aed5beae536c914dc7e872efd3cbd15791cd4340)
2 files changed