Update SAR table to mitigate RSE issue

Set BLE power to 20  (5 dBm) in the SAR table, the actual power would
be around 6 dBm, consider back off margin. This will only impact the
BLE power when the phone is associated with 5GHz wifi network.

Bug: 166362495
Test: Manual
Change-Id: I1b765476ac31147eeaca643efdde586db5197b26