tablet: use standard layout, cleanup

...a/cx/ring/dependencyinjection/JamiInjectionComponent.java

...roid/app/src/main/java/cx/ring/launch/LaunchActivity.java

...oid/app/src/main/java/cx/ring/launch/LaunchPresenter.java

...-android/app/src/main/java/cx/ring/launch/LaunchView.java

...-android/app/src/main/java/cx/ring/utils/DeviceUtils.java

...android/app/src/main/res/layout-sw600dp/activity_home.xml

...main/res/layout-sw600dp/frag_pending_contact_requests.xml

...ndroid/app/src/main/res/layout-sw600dp/frag_smartlist.xml

ring-android/app/src/main/res/layout/activity_launch.xml

ring-android/app/src/main/res/values-land/dimens.xml

...-android/app/src/main/res/values-sw600dp-xhdpi/dimens.xml

ring-android/app/src/main/res/values-sw600dp/attrs.xml

ring-android/app/src/main/res/values-sw600dp/dimens.xml

ring-android/app/src/main/res/values/attrs.xml

ring-android/app/src/main/res/values/dimens.xml