Bug 852246 - Allow installing over an app with >= version in Android 4.2 via the agent;r=jmaher

build/mobile/sutagent/android/DoCommand.java

@@ -3317,7 +3317,16 @@ private void CancelNotification()
 
         try
             {
-            pProc = Runtime.getRuntime().exec(this.getSuArgs("pm install -r " + sApp + " Cleanup;exit"));
+            // on android 4.2 and above, we want to pass the "-d" argument to pm so that version
+            // downgrades are allowed... (option unsupported in earlier versions)
+            String sPmCmd;
+
+            if (android.os.Build.VERSION.SDK_INT >= 17) { // JELLY_BEAN_MR1
+                sPmCmd = "pm install -r -d " + sApp + " Cleanup;exit";
+            } else {
+                sPmCmd = "pm install -r " + sApp + " Cleanup;exit";
+            }
+            pProc = Runtime.getRuntime().exec(this.getSuArgs(sPmCmd));
             RedirOutputThread outThrd3 = new RedirOutputThread(pProc, out);
             outThrd3.start();
             try {