Added cardview for current activity, updated url

...src/main/java/org/openhab/habdroid/model/Recognition.java

...in/java/org/openhab/habdroid/ui/RecognitionsActivity.java

...ain/java/org/openhab/habdroid/ui/RecognitionsAdapter.java

...c/main/java/org/openhab/habdroid/util/GetDataService.java

...ava/org/openhab/habdroid/util/RetrofitClientInstance.java

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

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

mobile/src/main/res/menu/left_drawer.xml

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