Frameworks: Policy: implement a pin keypad shuffler [1/2]

    this is to further prevent people using the tablet guessing your pin based on fingerprints left on the screen
    example of the expected outcome - https://www.dropbox.com/sh/r3xb2q53ksaqni9/Oz1Eu8Dm7O

    - correct coding style
    - added reload button

     PS1: use strings_custom
     PS2: Fix compile problem

kufi

    Ported to new keyguard package on 4.4

Change-Id: Ic19ae2482b5b4562c7c72d97aabd6238a047f0a2