tree cedd56c5b4fb79eeb38a684876f6f68271232c04
parent 6ae1a17d5eb332f00d10686bf7870ef999b1ff43
author SongFerngWang <songferngwang@google.com> 1617199725 +0800
committer SongFerngWang <songferngwang@google.com> 1617783632 +0800

Call waiting support USSD function

-Add USSD function
-Call waiting uses TelephonyManager's get/set methods
Bug: 180540626
Test: build pass. Manual test: set/get call waiting.

Change-Id: Ia03fd4ddef1defb1f0f9091c58ab0f1e43936457
Merged-In: Ia03fd4ddef1defb1f0f9091c58ab0f1e43936457