Remove enum logic from callers of requestbugreport()

Make callers use wrapper functions in ActivityManagerService.java.

The code to send broadcast to trigger API workflow (after checking the API
flag) is added in requestBugreport() in ActivityManagerService.java.
Remove that logic from this file.

Bug: 137825297
Bug: 141355059
Test: builds and full/interactive bugreports work as expected

Change-Id: Ibc305e4aca7d38fd4878b60f3f7f8c3274719c13