When receiving a text share an attempt is made to show a toast but that results
in an exception because the issuing thread is not running a looper.

Without this patch applied Share a text with an android device using the plasmoid
Result: No toast is displayed and in logcat you will get a:

java.lang.RuntimeException: Can't toast on a thread that has not called Looper.prepare() exception

With this patch applied again Share a text an android device using the plasmoid
Result: The toast is actually displayed even when the activity is not in the foreground