conversations: load items on-demand

...p/src/main/java/cx/ring/account/AccountEditionFragment.kt

...id/app/src/main/java/cx/ring/adapters/SmartListAdapter.kt

...d/app/src/main/java/cx/ring/adapters/SmartListDiffUtil.kt

...main/java/cx/ring/client/ConversationSelectionActivity.kt

...n/java/cx/ring/contactrequests/ContactRequestsFragment.kt

.../src/main/java/cx/ring/fragments/ContactPickerFragment.kt

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

...rc/main/java/cx/ring/fragments/LocationSharingFragment.kt

.../app/src/main/java/cx/ring/fragments/ShareWithFragment.kt

.../app/src/main/java/cx/ring/fragments/SmartListFragment.kt

...id/app/src/main/java/cx/ring/services/VCardServiceImpl.kt

...p/src/main/java/cx/ring/tv/cards/AbstractCardPresenter.kt

ring-android/app/src/main/java/cx/ring/tv/cards/Card.kt

...android/app/src/main/java/cx/ring/tv/cards/CardListRow.kt

...src/main/java/cx/ring/tv/cards/CardPresenterSelector.java

...p/src/main/java/cx/ring/tv/cards/CardPresenterSelector.kt

ring-android/app/src/main/java/cx/ring/tv/cards/CardRow.kt

...ain/java/cx/ring/tv/cards/ShadowRowPresenterSelector.java

.../main/java/cx/ring/tv/cards/ShadowRowPresenterSelector.kt

...pp/src/main/java/cx/ring/tv/cards/contacts/ContactCard.kt