Lower thread priority to pre-inflate BubbleTextView for all apps

During sys health review it was called out that we could lower the thread priority to pre-inflate BubbleTextView so that ui thread and loader task thread has better chance to run on big core.

Bug: 297352492
Test: Grabbed perfetto trace and observed preinflation is run on "preinflate-allapps-icons" thread
Change-Id: I9330d4fbe5a98cdb793e8bfa970dfd84ae1f6c39