This involved the typical Android design pattern of a "Base" style in
`values/styles.xml`, then the an empty normal style which uses that Base style
as a `parent` also in `values/styles.xml`, and finally any API specific
styles in another version of the normal style in a `values/styles-v17` folder.
Same was done for android:actionBarStyle moving it into into values-v11.
This time, didn't worry about the base style, because there was not much to be
gained. by doing so.
This makes it a lot easier to setup all the testing stuff. Mostly,
I'm tired of fighting Android Studio's fragility, so I want to remove
as much non-standardness as possible in the hopes of improving that
situation.
closes#534https://gitlab.com/fdroid/fdroidclient/issues/534
