Add TAINTED to MotionFlags in input.rs

As it stands, we should add all of our event flags to the MotionFlag,
otherwise we're bound to get some unexpected crashes.

Bug: none
Test: Build

Signed-off-by: Linnan Li <lilinnan@xiaomi.corp-partner.google.com>
(cherry picked from https://partner-android-review.googlesource.com/q/commit:0cc4d1d45b90376ddd5c916572e88f704c6f075a)
Merged-In: I6d53c8c0f995104fe5352356fc66fe586f6a86f1
Change-Id: I6d53c8c0f995104fe5352356fc66fe586f6a86f1