account: import/export

Add an option to export an account
Allow the user to import an account from his storage.
Ask permission if necessary.
Update translations.

Tuleap: #335
Change-Id: I6afefefb252871319930a0eb55bcf1a028a3da10
diff --git a/ring-android/app/src/main/jni/configurationmanager.i b/ring-android/app/src/main/jni/configurationmanager.i
index e6322b0..173c6cc 100644
--- a/ring-android/app/src/main/jni/configurationmanager.i
+++ b/ring-android/app/src/main/jni/configurationmanager.i
@@ -164,6 +164,9 @@
 
 void sendTrustRequest(const std::string& accountId, const std::string& to, const std::vector<uint8_t>& payload);
 
+int exportAccounts(std::vector<std::string> accountIDs, std::string toDir, std::string password);
+int importAccounts(std::string archivePath, std::string password);
+
 }
 
 class ConfigurationCallback {