Fixes commons-app#3436 and commons-app#2881: Media Detail design Overhaul (commons-app#3505)

* ic_map_dark_24dp: map icon for white background

* ic_info_outline_dark_24dp: info icon for dark background

* MediaDetailFragment: update the spacer as per image aspect ratio

* fragment_media_detail: design overhaul

* fragment_media_detail: remove redundant background color statements

* make requested changes

* add dark mode support

* minor ui tweak

* white map icon in dark mode

* make rquested changes

* make requested changes to layout

* fix misalignment of category list

* subtle amendments

* convert comments to javadocs

* minor amendments

* minor changes

* add styles for media detail

* Media detail fragment refactored

* make suggested changes

* minor name fix

* fix the delete button border

Author: kbhardwaj123