Send active device changed intent after connecting in AudioManager

Change will solve race condition with connecting device in AudioManager
and making active device propagated in system. This should handle audio
lact to earpiece while switching to Hearing Aid from LE audio device,
since both of devices uses communication device API.

Bug: 260223130
Tag: #feature
Test: Switch active devices from Dialer or Cached device list
Change-Id: I1bc10ffbcb380be15c52ca4124a0e91347dc4371