ext.rtlcite: Add to top queue and load with addModuleStyles

As per RoanKattouw's suggestions, changed the loading position to top
and changed CSS loading to static (addModuleStyles).

Bug: 48185
Change-Id: I319285d23a4f0a0522cc793f1a6661cda31a1ebf
Merge "ext.rtlcite: Add to top queue and load with addModuleStyles"