Re-implementation of https://github.com/termux/termux-app/pull/1029.
If Termux has property "allow-external-apps" set to "true", a third-party
program will be able to send intents for executing custom commands
within Termux environment.
Third-party program must declare permission "com.termux.permission.RUN_COMMAND".
This is the launcher icon with a circle around it. I added the circle
because the icon has a transparent background, so it looks a bit weird
with just the >_.
Why:
* During backup process Termux is being killed in most cases.
* Backup data is limited to 25 MB.
* Backup may not be performed/updated in certain cases.
The failsafe activity were infrequently used while confusing users.
Replace it with an app shortcut on Android 7.1+ and a separate app on
earlier versions.
Also enables session autoclosing so no more "annoying" messages
about "process completed - press enter". There autoclosing will be
performed on exit codes '0' and '130'.
On Android TV devices old behaviour will be used - auto close enabled for all
sessions when amount of running sessions >1.
Commit f0eeb47 introduced configurable extra keys and thus changed the
height of the viewpager to be multipled by the number of rows of extra
keys. However, the extra keys had two rows at the time, so the initial
height should have been changed to half of what it was now that it is
multiplied. This was not done, so the viewpager was twice the height it
should be after that change.
Icons used in notifications/status bar are monochrome and should use only white color and transparency. It is displayed fine on Android emulators but it's shown in black on Samsung Galaxy S7 running Android 7.0.
After the change, status bar icon is white and the small icon in notification still uses the black color set via setColor(). Termux doesn't support devices running Android older than 5.0 but using white color in vector drawables would be also necessary to generate proper (white) bitmap icons.
Split the app/ module into three modules
terminal/ - Terminal emulator library module.
view/ - Terminal view library module (depending on terminal/).
app/ - The main Termux app (depending on view/).
Also add the
float/ - The Termux:Float app (depending on view/).
