Unable to input PIN with hardware keyboard

After typing a wrong PIN, the EditText view will be disabled and lose the focus,
as a result, inputs from hardware keyboard won't be sent to PIN EditText.

Test: 1. Enable PIN lock
Test: 2. Lock the device with Power key
Test: 3. Enter wrong PIN from a physical keyboard
Test: 4. Try to enter PIN again with physical keyboard

Bug: 119287260

Change-Id: I04df523c19c99bef75ea481b44154f7ba2270689
Signed-off-by: Wang, ArvinX <arvinx.wang@intel.com>
Signed-off-by: Guobin Zhang <guobin.zhang@intel.com>