android: Further reduce size of LibreOfficeExperimentalDesktop.apk.

It still seems to work for me.
Probably we do not need more components, but it's small enough for now.

Also add uui into 'core' group.

Change-Id: Ifadea8aa819ed17bbd021a0fa2373e6287e06446
Only component-mapping.h is needed here.

Change-Id: I09fc944d7d19e8a2804d8530ba2a98b5719d8b37