extended try-catch to catch an Unexpected NullPointerException
Merge pull request #1034 from Catrobat/cat-931

[CAT-931] extended try-catch
nexus7 workaround for checking flash
nexus7 bug fixed. prevents stage start and displays toast message
nexus 7 flashlight bug fixed
LedBrickTest for other devices extended
stacktrace prints
fixed number of bricks in category brick test
Merge branch 'vib_and_led_brick_noflashfix' of https://github.com/Catrobat/Catroid into vib_and_led_brick_noflashfix