Mms: Put the AudioInfoView below the ImageView

The set text layout setting only control the text's position relative
to the picture.

Put the AudioInfoView below the ImageView, so if set text layout to
text on bottom, text will show at the bottom of the slide.

CRs-Fixed: 670785, 636486, 730578

Change-Id: I187f09ae06ae1d5f4effe4ef347a686f0170be81