android: add connect to server

.../src/main/java/cx/ring/account/AccountWizardActivity.java

...ain/java/cx/ring/account/HomeAccountCreationFragment.java

...main/java/cx/ring/account/JamiAccountConnectFragment.java

...rc/main/java/cx/ring/account/RingLinkAccountFragment.java

...a/cx/ring/dependencyinjection/RingInjectionComponent.java

...ava/cx/ring/tv/account/TVHomeAccountCreationFragment.java

...-android/app/src/main/res/layout/frag_acc_home_create.xml

...droid/app/src/main/res/layout/frag_acc_import_archive.xml

...android/app/src/main/res/layout/frag_acc_jami_connect.xml

...-android/app/src/main/res/layout/frag_acc_ring_create.xml

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

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

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

...src/main/java/cx/ring/account/AccountWizardPresenter.java

...in/java/cx/ring/account/HomeAccountCreationPresenter.java

...rc/main/java/cx/ring/account/HomeAccountCreationView.java

...ain/java/cx/ring/account/JamiAccountConnectPresenter.java

...src/main/java/cx/ring/account/JamiConnectAccountView.java

.../libringclient/src/main/java/cx/ring/model/ConfigKey.java

...lient/src/main/java/cx/ring/mvp/AccountCreationModel.java