Add Signal Strength Threshold HAL for 4G and 5G

Test: Build
Bug: 135717625

Change-Id: I324cfd592ca53a12ebe1161f242ae3b9c7fc59a4
Merged-In: I324cfd592ca53a12ebe1161f242ae3b9c7fc59a4
(cherry picked from commit 1f4012f417831ae076bb3861e1ac3f4c14fe2d7c)
7 files changed