Merge pull request #1923 from awakecoding/egfx

MS-RDPEGFX Initial Implementation (WIP)
encomsp: stub client/server virtual channel
channels/encomsp: initial client-side implementation
Changed android default theme to AppCompat.Light.DarkActionBar.
Removed inverted text color from exit dialog.
Merge pull request #1925 from mfleisz/andr_theme_fix

Changed android default theme to AppCompat.Light.DarkActionBar.
Added german translation.
Modified translation, better wording in context.
Fix conflicting define

WTSVirtualEventHandle and WTSVirtualChannelReady are already defined in wtsapi.h
and with different values.
server/Sample: stub server-side encomsp channel
Merge pull request #1927 from akallabeth/android-de-translation

German translation for aFreeRDP
Find glibconfig.h cmake should use pkgconfig information instead of a hard coded path to /usr/lib.

the OnOpen callback should be called when set to avoid a segfault.
client/common: start parsing of .msrcIncident Remote Assistance file
client/common: parse RCTICKET Connection String 1
channels/remdesk: stub virtual channel
client/common: parse and use remote assistance file
channels/remdesk: start parsing messages
client/common: add .msrcIncident type 1 file test
client/common: improve remote assistance blob encryption
client/common: fix Remote Assistance memory leaks
client/common: start parsing Remote Assistance Connection String 2