plugins: add preferences per account

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

...c/main/java/cx/ring/account/JamiAccountSummaryFragment.kt

...-android/app/src/main/java/cx/ring/client/HomeActivity.kt

...main/java/cx/ring/fragments/PluginHandlersListFragment.kt

...id/app/src/main/java/cx/ring/plugins/PluginPreferences.kt

...in/java/cx/ring/settings/pluginssettings/PluginDetails.kt

.../settings/pluginssettings/PluginPathPreferenceFragment.kt

...x/ring/settings/pluginssettings/PluginSettingsFragment.kt

...va/cx/ring/settings/pluginssettings/PluginsListAdapter.kt

...g/settings/pluginssettings/PluginsListSettingsFragment.kt

...d/app/src/main/java/cx/ring/tv/account/TVAccountExport.kt

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

...id/app/src/main/res/layout/frag_plugins_list_settings.xml

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

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

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

...in/kotlin/net/jami/account/JamiAccountSummaryPresenter.kt

...rc/main/kotlin/net/jami/account/JamiAccountSummaryView.kt