Do not generate meta state for device does not have the key.

Check if device has CAPS_LOCK and NUMS_LOCK keys, if they don't have
the keys do not generate the meta state.

Bug: 166680149
Test: atest libinput_tests, atest inputflinger_tests
Change-Id: I4c66b347dc9f2b0417c53bbbee18c78d11bf22b1
2 files changed