new sensor values and lights control

...a/de/tudresden/inf/st/sensorsharing/common/Constants.java

gui/src/main/java/com/example/gui/LoginActivity.java

gui/src/main/res/layout/activity_login.xml

mobile/src/main/AndroidManifest.xml

.../java/de/tudresden/inf/st/sensorsharing/MainActivity.java

...in/java/de/tudresden/inf/st/sensorsharing/MqttTopics.java

mobile/src/main/res/layout/activity_main.xml

mobile/src/main/res/layout/fragment_first.xml

mobile/src/main/res/layout/fragment_second.xml

mobile/src/main/res/layout/fragment_third.xml

mobile/src/main/res/values/strings.xml

.../java/de/tudresden/inf/st/sensorsharing/MainActivity.java

wear/src/main/res/layout/activity_main.xml

wear/src/main/res/values/strings.xml