Add libprocessgroup dependency and fix sched_policy include

libaudioclient and libmedia are using get_sched_policy and
set_sched_policy which are now implemented inside libprocessgroup.
Add required dependencies and include required headers.

Exempt-From-Owner-Approval: janitorial

Bug: 111307099
Test: builds, boots

Change-Id: I83dd6878839122e3ea71b7be6f6f312376897d56
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
diff --git a/media/libmedia/IMediaMetadataRetriever.cpp b/media/libmedia/IMediaMetadataRetriever.cpp
index 590ba1a..f9fa86e 100644
--- a/media/libmedia/IMediaMetadataRetriever.cpp
+++ b/media/libmedia/IMediaMetadataRetriever.cpp
@@ -23,6 +23,7 @@
 #include <media/IDataSource.h>
 #include <media/IMediaHTTPService.h>
 #include <media/IMediaMetadataRetriever.h>
+#include <processgroup/sched_policy.h>
 #include <utils/String8.h>
 #include <utils/KeyedVector.h>