MMS: SlideShow Layout is changed when rotate DUT

When we rotate the DUT, the activity will be reload again,
the status of the layout will display the default value
which is layout_bottom.

add the android:configChanges="orientation|screenSize|
keyboardHidden" for this activity.

CRs-Fixed: 413502

Change-Id: I15fe34bff9f192aa9f6ce4698217db45e8f65d5d