tree 808e54534f85022d2be7d7936c6b7337cd9cf7a6
parent 5a56c3191318a2a193acc28abdc19589157f4d31
author Jin Dong <jin.x.dong@sony.com> 1513936163 +0800
committer Shunta Sato <shunta.sato@sony.com> 1517211165 +0900

Fix memory leak of DataSaverPreference

When DataSaverPreference is shown repeatedly, memory leak happens
since DataSaverBackend.Listener is not removed on onDetached().

TEST: Repeat enter and exit "Data usage" for
several times and check if the count of activity
is not increasing.

Bug: 72581115
Change-Id: Ic4a72de049bb87f1e522fe46dd0fb4bb58ed65a5