tree 2582058e234753f634446a2790fc39c5aae687d1
parent be7be3bfcb69bce0223d01f4a20fd833a1673035
author yuanjiahsu <yuanjiahsu@google.com> 1536234855 +0800
committer Leo Hsu <leohsu@google.com> 1538535821 +0000

Use feature flag in Settings.

User can enable/disable faster emergency phone call feature by switching
feature flag from Settings, and the old flag switched by adb command was
replaced by this feature flag.

Test: Manually

Bug: 112168722
Bug: 113539598

Change-Id: Iaa2389845301d387da5924daa368169a8e6768c1
Merged-In: Iaa2389845301d387da5924daa368169a8e6768c1