Bug 2339655. Should hangup the existing voice call (including onhold ones) before powering off radio to ensure the proper sequence at radio protocol level. Otherwise the carrier will treat it as drop calls.
This indicates to the UI that the hangup command has been received by the
Telephony layer and passed down to the RIL, but we have not yet been notified
of a successful DISCONNECT.
Addresses http://b/issue?id=1659876.
The changes from 090602 update frameworks/base to support 3way calling
and call waiting.
The changes from 090603 completed the CdmaInformationRecords class
but the original changes submitted has been simplified, toString added
and a bug fixed where the notifications where not being handled properly.
The changes from 090605 added Prl Version, apn fixes.
