Remove service entry from Telecom manifest.

BluetoothPhoneService was removed in S; this manifest entry is redundant
and can cause a system service crash if someone tries to start it.

Test: Build; presubmit checks.
Flag: Manifest change cannot be flagged; trivial fix.
Fixes: 311118446
Change-Id: I90fcf60a427d0157b54cc9b0da9750e6b2642a13