Kill the real/isolated uid group, not the ApplicationInfo uid

This is a direct reimplementation in L of fixes applied to N in
these two commits:

8dc8d37
e8741d2

Bug 19285814

Change-Id: I59bcc8f1d41c426e9da635bea9ad1d7c6756d5aa

Resolve merge conflict when cp'ing ag/941553 to mnc-mr1-release branch

Author: Christopher Tate

services/core/java/com/android/server/am/ActivityManagerService.java

@@ -2814,7 +2814,7 @@ final void removeLruProcessLocked(ProcessRecord app) {
             if (!app.killed) {
                 Slog.wtfStack(TAG, "Removing process that hasn't been killed: " + app);
                 Process.killProcessQuiet(app.pid);
-                killProcessGroup(app.info.uid, app.pid);
+                killProcessGroup(app.uid, app.pid);
             }
             if (lrui <= mLruProcessActivityStart) {
                 mLruProcessActivityStart--;
@@ -3189,7 +3189,7 @@ final ProcessRecord startProcessLocked(String processName, ApplicationInfo info,
             // clean it up now.
             if (DEBUG_PROCESSES || DEBUG_CLEANUP) Slog.v(TAG_PROCESSES, "App died: " + app);
             checkTime(startTime, "startProcess: bad proc running, killing");
-            killProcessGroup(app.info.uid, app.pid);
+            killProcessGroup(app.uid, app.pid);
             handleAppDiedLocked(app, true, true);
             checkTime(startTime, "startProcess: done killing old proc");
         }
@@ -4705,7 +4705,7 @@ final void appDiedLocked(ProcessRecord app, int pid, IApplicationThread thread,
             if (!fromBinderDied) {
                 Process.killProcessQuiet(pid);
             }
-            killProcessGroup(app.info.uid, pid);
+            killProcessGroup(app.uid, pid);
             app.killed = true;
         }
 

services/core/java/com/android/server/am/ProcessRecord.java

@@ -548,7 +548,7 @@ void kill(String reason, boolean noisy) {
             }
             EventLog.writeEvent(EventLogTags.AM_KILL, userId, pid, processName, setAdj, reason);
             Process.killProcessQuiet(pid);
-            Process.killProcessGroup(info.uid, pid);
+            Process.killProcessGroup(uid, pid);
             if (!persistent) {
                 killed = true;
                 killedByAm = true;