Translate mobile find on Android

> find 'email'
post /execute
mobile: find
className( "android.widget.EditText" ).descriptionContains( "email" )
className( "android.widget.EditText" ).textContains( "email" )
className( "android.widget.Button" ).descriptionContains( "email" )
className( "android.widget.Button" ).textContains( "email" )
className( "android.widget.ImageButton" ).descriptionContains( "email" )
className( "android.widget.ImageButton" ).textContains( "email" )
descriptionContains( "email" )
textContains( "email" )

Fixes #51