Ongoing CallStyle notifications can be promoted even without being colorized.

Also fixes an issue where a "title" was defined incorrectly. It allowed non-BigTextStyle notifications to use EXTRA_TITLE_BIG to circumvent the requirement for a title, and it required calls to set a title even though it would never be set.

Flag: android.app.api_rich_ongoing
Bug: 367705002
Test: atest NotificationTest
Change-Id: Ie063bca8508538dd4515d3f7bf2e284548085040