DocumentsUI: Workaround for aapt warnings

* Now we should be completely free of aapt warnings

Change-Id: I8e6886f9ac93adb19c80887a1b7329ae9b942125
Bypass the lockscreen when the hardware keyboard is slid out and security mode is 'none'

Change-Id: Ie40bb33ea46b7e68bad9916a0073cdf07a42ff93