Fix 2656989. Clean up update to updated system applications.

Change-Id: Ic66b00926c45fac43396f1f8f23d0865ba77faba

Author: Suchi Amalapurapu

services/java/com/android/server/PackageManagerService.java

@@ -5780,6 +5780,18 @@ private void replaceSystemPackageLI(PackageParser.Package deletedPackage,
                 }
                 mSettings.writeLP();
             }
+        } else {
+            // If this is an update to an existing update, setup 
+            // to remove the existing update.
+            synchronized (mPackages) {
+                PackageSetting ps = mSettings.getDisabledSystemPkg(packageName);
+                if (ps != null && ps.codePathString != null &&
+                        !ps.codePathString.equals(oldPkgSetting.codePathString)) {
+                    int installFlags = 0;
+                    res.removedInfo.args = createInstallArgs(0, oldPkgSetting.codePathString,
+                            oldPkgSetting.resourcePathString);
+                }
+            }
         }
     }