Refactor RcsFEatureManager to be created from TelephonyRcsService

The RcsFeatureManager and management code has been moved from
ImsService to RcsFetureManager in order to remove some of the messy
coupling that had to occur to get signalling between them.

Test: atest FrameworksTelephonyTests
Test: atest TeleServiceTests
Test: atest CtsTelephonyTestCases
Change-Id: I2cc8785f1f7feed78d82a136621abfc66391e008