MSIM(DSDA): Retain LCH mode of other active sub for MT far-end disconnect.

When a call is ended by remote party on one sub, if an active call is
present in other sub, set the other sub as active while retaining
it's LCH state.
If the call was disconnected locally, disable LCH for the other active
sub.

Conflicts:
	src/com/android/incallui/CallCommandClient.java

CRs-Fixed: 548848
Change-Id: I31e0fd445e243fcabbca39eb8498ba99c55a96a1
InCallUI: Disable volume boost during IMS call

Extracted from 7ecc9d97de6c3c9bb74d6ad5ccdcda257d801a25 caf/LNX.LA.3.7.2.1
to separate it out from call recording changes we don't want to pickup

Change-Id: Idc3c989d6808d690232d4405a9e4fb201cb839bf