I Found the solution...and is working perfectly. So You need to set this:
#Region Activity Attributes
#FullScreen: True
#IncludeTitle: False
#End Region
And in code add this under activity_create
'HIDE Bottom Bar
oldActivityHeight = Activity.Height
l = GetDeviceLayoutValues
If p.SdkVersion >= 16 Then
r.Target = r.GetActivity
r.Target = r.RunMethod("getWindow")
r.RunMethod4("setFlags", Array As Object(FLAG_FULLSCREEN, FLAG_FULLSCREEN), Array As String("java.lang.int", "java.lang.int"))
Activity.Height = l.Height+8%y
DoEvents
End If
And Top and Bottom Bar is completly hidden under Android 4.1.2....so the idea was when showing grey bottom bar like on first screen shoot above is to expand height of bottom bar to down...to hide it..on FULL HD monitor it is 8%y...i im not experimenting what it is on 720p...but playing with values up or down you will get desired results.