ANDROID: GKI: re-enable CONFIG_MEDIA_CAMERA_SUPPORT

MEDIA_CAMERA_SUPPORT was removed from gki_defconfig in commit
b5e512c4 ("ANDROID: GKI: update gki defconfigs") because it is
now enabled by default unless MEDIA_SUPPORT_FILTER is enabled. After
commit 4467f115 ("ANDROID: gki_defconfig: Enable
MEDIA_SUPPORT_FILTER"), MEDIA_CAMERA_SUPPORT again needs to be
explicitly enabled.

Bug: 162909109
Signed-off-by: Connor O'Brien <connoro@google.com>
Change-Id: Ia68d6e233e86b405ea4fbc0e292e6b0778c90704