tree 1b35e11e9ba97391df9c623c762b1e5182098518
parent 460a52947192febdf99f37cb761710a46c63fd46
author Shaotang Li <shaotangli@google.com> 1531992579 +0800
committer Shaotang Li <shaotangli@google.com> 1536208698 +0800

Add new telecom metrics for emergency dialer

These includes,
1. The source where user initiated the call.
2. The duration between START_CONNECTION and REQUEST_DISCONNECT.

Bug: 111818008
Test: manual and check the result of
'adb shell dumpsys telecom' for metrics data
Change-Id: Iddc7f256362abe9fe252bd12cead05a7d77d329e