use a ScrollView for Account Wizard screens to accomodate long translations
use a ScrollView for Account Wizard screens to accomodate long translations

Some languages are more verbose, or also have longer spellings.  Long
languages on a small screen mean the buttons get obscured.

This looks like a big change because I also formatted the file with the
Android formatter.  But literally I just changed the most external item
from a LinearLayout to a ScrollView.

closes #4540 https://dev.guardianproject.info/issues/4540

Heart2009/ChatSecureAndroid,eighthave/ChatSecureAndroid,n8fr8/ChatSecureAndroid,Heart2009/ChatSecureAndroid,guardianproject/ChatSecureAndroid,n8fr8/ChatSecureAndroid,eighthave/ChatSecureAndroid,kden/ChatSecureAndroid,anvayarai/my-ChatSecure,prembasumatary/ChatSecureAndroid,kden/ChatSecureAndroid,joskarthic/chatsecure,joskarthic/chatsecure,Heart2009/ChatSecureAndroid,prembasumatary/ChatSecureAndroid,guardianproject/ChatSecureAndroid,bonashen/ChatSecureAndroid,anvayarai/my-ChatSecure,bonashen/ChatSecureAndroid,anvayarai/my-ChatSecure,h2ri/ChatSecureAndroid,prembasumatary/ChatSecureAndroid,n8fr8/ChatSecureAndroid,bonashen/ChatSecureAndroid,guardianproject/ChatSecureAndroid,n8fr8/AwesomeApp,n8fr8/AwesomeApp,kden/ChatSecureAndroid,eighthave/ChatSecureAndroid,joskarthic/chatsecure,h2ri/ChatSecureAndroid,h2ri/ChatSecureAndroid,n8fr8/AwesomeApp