Only allow ImsManager to work with FEATURE_TELEPHONY_IMS

Only allow ImsManager to set up resources when FEATURE_TELEPHONY_IMS
is defined. Otherwise, do not spend resouces connecting or retrying
infinitely, since IMS is not available.

Bug: 118823723
Test: atest FrameworksTelephonyTests
Merged-In: Idebf0add06314f4fe1aaf730688a327eecc2a36d
Change-Id: Idebf0add06314f4fe1aaf730688a327eecc2a36d