default: Update to Android-4.4.4_r1

Change-Id: I4c3b28e6a838f047ba6ec791329055898b81d36f
Replace hardware/qcom/keymaster path to new repository android_hardware_qcom_keymaster

Change-Id: Ia06bdfcd40a7d1430e1c5a3fbdaaca84a0970a05
Merge remote-tracking branch 'omni/android-4.4' into omni-4.4