Update MediaViewer submodule

Backports one bugfix for MediaViewer:
    Fix metadata footer positioning in fullscreen mode
    Ic5fdce5fb3d6884df782f8bc9ec5c9a5c67edbd6

Change-Id: Ic48f272d9458039db3d0aa64666769758cbb4d5b
Merge "Update MediaViewer submodule" into wmf/1.24wmf14