Update gaming_input_unstable_client to support key bits

This allows hardware keybits to be passed from chrome to
android

Bug: 138966497
Test: Manual test verifying key bits are passed from
chrome to android

Change-Id: I24022dfdc5004c1da222a075aebe6b7481f6f377
(cherry picked from commit 1a50ed85991586714e02da40f832224732aaa181)
1 file changed