More DynamicPagerAdapter fixes

fixes #2223
Fix PRNGFixes to work with SELinux enforce mode

makes /dev/urandom not writable on some devices
fixes #2212
missed import
Merge branch 'pageradapter' of https://github.com/devrandom/Gibberbot into devrandom-pageradapter
clean up of drawables for better menus, cleaner look
solid color background now; removing crazy colors for now
move file sharing, profile, end chat to actionbar menu
fix emoji selector to have titles for each area
updates resources and layouts for UI improvements
support per message delivery and encryption icons
ensure broadcast is not called more than once at a time
this can cause a crash
improve flexibility for display in actionbar
support text/list mode again
not used anymore
move functions to actionbar whenever possible
fixes account/provider status on AccountList screen
allow background image to set on the lockscreen
update menu item groups for dynamic changes
change actionbar menus for proper encryption state
display the presence status text if no custom one is set
handle dynamic changes of actionbar menu items