tree 921e9210417bef8553a5226764223ad51ca10268
parent 6e9b207326a378da2cbbf4e3fbf3fe0a58e56800
author Fan Zhang <zhfan@google.com> 1510871221 -0800
committer Fan Zhang <zhfan@google.com> 1510871221 -0800

Add android:key to all preferences.

This attribute is required for settings search.

Bug: 69384409
Test: ag/3241939
Change-Id: I31b5fd9dc689cd77a4c306a44beb21ff8d4d7b5b