* #34699: working multi credential setting

jni/Application.mk

res/layout/credentials_pref.xml

res/menu/account_edition.xml

res/xml/account_credentials.xml

src/org/sflphone/account/AccountCredentials.java

src/org/sflphone/account/AccountDetailsHandler.java

src/org/sflphone/account/CredentialsManager.java

src/org/sflphone/client/AccountEditionActivity.java

src/org/sflphone/fragments/AdvancedAccountFragment.java

src/org/sflphone/fragments/GeneralAccountFragment.java

src/org/sflphone/fragments/NestedSettingsFragment.java

src/org/sflphone/fragments/SecurityAccountFragment.java

src/org/sflphone/model/Account.java

src/org/sflphone/service/SipService.java

src/org/sflphone/views/CredentialsPreference.java