Fixes an issue where the wrong icons where ambient

This is a regression from P from when we hid the
statusbar icons of non-high-priority notifications
by default

Fixes: 134444704
Test: atest SystemUITests
Merged-In: I2e571353735efb0d763ecc236f60aefe4c2b51d4
Change-Id: I2e571353735efb0d763ecc236f60aefe4c2b51d4