Add libprocessgroup dependency and fix sched_policy include

surfaceflinger, installd and libvrflinger are using set_sched_policy
which is moved into libprocessgroup. Add libprocessgroup dependency
and include required headers.

Exempt-From-Owner-Approval: janitorial

Bug: 111307099
Test: builds, boots

Change-Id: Iccb7c54a85ca148d44ce687fe05e89ad4369e104
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
diff --git a/libs/vr/libvrflinger/Android.bp b/libs/vr/libvrflinger/Android.bp
index 4f8bdbf..2829353 100644
--- a/libs/vr/libvrflinger/Android.bp
+++ b/libs/vr/libvrflinger/Android.bp
@@ -47,6 +47,7 @@
     "liblog",
     "libhardware",
     "libnativewindow",
+    "libprocessgroup",
     "libutils",
     "libEGL",
     "libGLESv1_CM",