Insufficient ProcessRecord cleanup when persistent process is killed

When persistent process with Service restarts, ActivityManagerService
does not reset ProcessRecord#hasClientActivites to false
(because ProcessRecord of persistent process is continued using
after killing).

It disturbs updating LRU list in ActivityManagerService, and then,
when new process calls ActivityManagerProxy#publishContentProviders,
SecurityException happens because of no entry in the list.

Bug: 13517358

Change-Id: I46b064f71a4f7025ade1bf117801352a7ab22e6a
Lockscreen: Add chinese string for airplane mode

There is no chinese string resource for lockscreen_airplane_mode_on.

Define the chinese string for airplane mode.

CRs-Fixed: 561393

Change-Id: I59d2fd42f8b3140a934614a4977dc7ade0332c6d