Use correct package name to create Icons for Apps

Previously we used SystemUI Context which resulted in 3P apps having
Icons with the wrong packageName com.android.systemui. To fix this,
we're now directly passing in the correct package name to create the
icon.

Bug: 403244725
Flag: com.android.systemui.extended_apps_shortcut_category
Test: InputGestureDataAdapterTest
Change-Id: I9decf36534e637648ee158d1f326f701e88b3b0f