RESTRICT AUTOMERGE Ensure InputMessage is sanitized

Security check for libinput. Send a known message via InputChannel,
where some of the padded bytes have been intentionally modified. Next,
read these back on the consumer channel to ensure that the padding bytes
have been zeroed out.

Bug: 115739809
Bug: 120630087
Test: cts-tradefed run cts -m CtsSecurityBulletinHostTestCases -t android.security.cts.Poc19_03
Change-Id: I23d6b979c5ff13272626bb0610834fd1147cf645
Merged-In: I23d6b979c5ff13272626bb0610834fd1147cf645
(cherry picked from commit d6e89d37)