[RONs] Update notification colors

The OS will generate a simple palette for colored notifications based on the provided color.

The primary and secondary surfaces will be blended with a new "surface extreme" color at 90% and 80% opacity, respectively.

The surface extreme color will be black when the provided color is not dark. Otherwise, it will be white.

Bug: 369149914
Test: visual test, screenshot tests to come later
Flag: android.app.ui_rich_ongoing

Change-Id: Ie7bc9ab99d4cce82c6643036dec85d2d82e8234f