Create a DisableInfo object instead of exposing DISABLE_* flags

The DISABLE_* flags fall into two namespaces, helpfully named DISABLE_*
and DISABLE2_*. Seeing as that's kind of domain specific and not clear
enough, this change adds StatusBarManager#DisableInfo as a way to
describe which components an app has requested to be disabled.

It could also be used to remove the need for diasble() and disable2() in
the future.

Test: atest GtsStatusBarHostTestCases
Bug: 123430822
Change-Id: Iecd5119e01fbabf113b5cfbe8f02f8f0d990e9fb