Invert everything for text if it is ForceInvert

Invert the colors of DrawTextBlob when we perform a full color force
inversion within an app.to guarantee the contrasts between ops.

Bug: 406341247
Test: manually check the behaviors on Starbucks and Phone settings
Flag: android.view.accessibility.force_invert_color
Change-Id: I4a42b718e752fdf7d687e4e20ec639eb6db4fa07