ui: use fragment compat

...ndroid/app/src/main/java/cx/ring/about/AboutFragment.java

...ndroid/app/src/main/java/cx/ring/client/CallActivity.java

...pp/src/main/java/cx/ring/client/ConversationActivity.java

...ndroid/app/src/main/java/cx/ring/client/HomeActivity.java

...p/src/main/java/cx/ring/client/QRCodeScannerActivity.java

...java/cx/ring/contactrequests/ContactRequestsFragment.java

...in/java/cx/ring/fragments/AccountsManagementFragment.java

...oid/app/src/main/java/cx/ring/fragments/CallFragment.java

...src/main/java/cx/ring/fragments/ConversationFragment.java

...in/java/cx/ring/fragments/SIPAccountCreationFragment.java

...pp/src/main/java/cx/ring/fragments/SmartListFragment.java

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

ring-android/app/src/main/java/cx/ring/mvp/BaseActivity.java

...app/src/main/java/cx/ring/mvp/BasePreferenceFragment.java

...id/app/src/main/java/cx/ring/mvp/BaseSupportFragment.java

.../main/java/cx/ring/navigation/RingNavigationFragment.java

.../app/src/main/java/cx/ring/settings/SettingsFragment.java

...ndroid/app/src/main/java/cx/ring/share/ShareFragment.java