Add keyguard permission to instrumented ImfTest package.

<manifest xmlns:android="http://schemas.android.com/apk/res/android" 

        package="com.android.imftest">

   <uses-permission android:name="android.permission.DISABLE_KEYGUARD" />

   <application>

        <activity android:name=".samples.InputTypeActivity" android:label="Input Type Activity">