Fake action bar for the call view

res/drawable-xhdpi/ab_stacked_solid_light_holo.9.png

res/drawable-xhdpi/device_access_call.png

res/drawable-xhdpi/device_access_dial_pad.png

res/layout/activity_call_layout.xml

res/layout/frag_call.xml

src/com/savoirfairelinux/sflphone/client/CallActivity.java

...com/savoirfairelinux/sflphone/fragments/CallFragment.java

src/com/savoirfairelinux/sflphone/model/BubbleModel.java

src/com/savoirfairelinux/sflphone/model/BubblesView.java