Necessary to avoid client surfaces that continuously update their
contents (i.e., a video) to effectively nullify a valid activate_app
request, causing a short flip for the new client surfaces, but resume
back once the first surface updated its contents.
Bug-AGL: SPEC-3297
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Change-Id: I450dc58d2fa0202f42b7ab58216db98a1bbbf178