Merge "Do not kill the server process itself" am: b38b1408dc am: 629a3621d3

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2503855

Change-Id: I2dc9a4d71862a2663b2cb7cd14150f3484de3baf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

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

@@ -2573,7 +2573,10 @@ public final class ProcessList {
                     + ", " + reason);
             app.setPendingStart(false);
             killProcessQuiet(pid);
-            Process.killProcessGroup(app.uid, app.getPid());
+            final int appPid = app.getPid();
+            if (appPid != 0) {
+                Process.killProcessGroup(app.uid, appPid);
+            }
             noteAppKill(app, ApplicationExitInfo.REASON_OTHER,
                     ApplicationExitInfo.SUBREASON_INVALID_START, reason);
             return false;