Clean hidden api - getSystemService

Remove hidden api for mainline project.
This commit is for misc android/os apis.
Changes alls call to getSystemService to make lint an happy robot

Bug: 190440540
Test: atest packages/apps/Bluetooth/tests/unit
Tag: #refactor
Merged-In: Ia5ea35a6d92f6e475d3a8c686e9bbe0b0ee9c9d6
Change-Id: Ia5ea35a6d92f6e475d3a8c686e9bbe0b0ee9c9d6