drm/msm/hdcp: send type on minimum encryption level change

Send the updated content stream type to the HDCP receiver
when the minimum encryption level changes as this will
enable the receiver to correctly decode and decrypt the
stream.

CRs-Fixed: 2340074
Change-Id: I205f61b2ef30caff947c8b4d37e0f71e05f6da4a
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>