Rename InputConfig field SENSITIVE_FOR_TRACING to SENSITIVE_FOR_PRIVACY

Making this field more generic to cater for wider use cases. In
addition to input tracing this field will also be used to hide privacy
sensitive input interactions from mirrored displays.

Test: presubmit
Bug: 325252005
Flag: NA
Change-Id: If4bf5aa6ed28f5a976aa9d5aeffb464e2551dfc3