CEP support for epdg conference call is added

Compatible with both CEP enabled and CEP not enabled carriers.
1. If number of call ids after call merge is greater than 1 and new conference call id is available, the carrier should be CEP enabled.
2, If number of call ids is equal to 1 after call merge and the call id is not equal to any of previous call id, the carrier is not CEP enabled.

Bug: 138699586
Test: yes, locally.
Change-Id: I55a7ba3a89279d2098b5019e6372f15aab4883fe
1 file changed
tree: 7b926c8323401580ddda3d49e25d9ea20873c251
  1. acts/
  2. tools/
  3. wts-acts/
  4. Android.mk
  5. OWNERS
  6. PREUPLOAD.cfg