set tapjacking protection for deviceadmin permission dialog

Second try to commit tapjacking protection for device administrator permission dialog.
Remplaced tap by spaces
Signed-off-by: Stephan Huber <huber.stephan.sit@gmail.com>

Change-Id: I8e14e713d1f039ca79f5006cdeb12b65652884fb

src/com/android/settings/DeviceAdminAdd.java

diff --git a/src/com/android/settings/DeviceAdminAdd.java b/src/com/android/settings/DeviceAdminAdd.java
index ed95500..c9f876b 100644
--- a/src/com/android/settings/DeviceAdminAdd.java
+++ b/src/com/android/settings/DeviceAdminAdd.java
@@ -259,6 +259,7 @@
         mAdminWarning = (TextView) findViewById(R.id.admin_warning);
         mAdminPolicies = (ViewGroup) findViewById(R.id.admin_policies);
         mCancelButton = (Button) findViewById(R.id.cancel_button);
+        mCancelButton.setFilterTouchesWhenObscured(true);
         mCancelButton.setOnClickListener(new View.OnClickListener() {
             public void onClick(View v) {
                 EventLog.writeEvent(EventLogTags.EXP_DET_DEVICE_ADMIN_DECLINED_BY_USER,
@@ -267,6 +268,7 @@
             }
         });
         mActionButton = (Button) findViewById(R.id.action_button);
+        mActionButton.setFilterTouchesWhenObscured(true);
         mActionButton.setOnClickListener(new View.OnClickListener() {
             public void onClick(View v) {
                 if (mAdding) {