Added GetActiveSubscriptionInfo support

1. Added GetActiveSubscriptionInfo.
2. Added SetDisplayNameUsingSrc.
3. Converted more modules to use SubscriptionManagerService.

Test: atest FrameworksTelephonyTests
Bug: 239607619
Merged-In: Ibfbdd301162f25928e4fd26f976e5f17e2cfe24b
Change-Id: Ibfbdd301162f25928e4fd26f976e5f17e2cfe24b
2 files changed