Add libprocessgroup dependency

Because set_sched_policy is moved into libprocessgroup an additional
dependency is required for its users. libframeworksnettestsjni requires
libprocessgroup otherwise com.android.frameworks.tests.net fails with
error:
dlopen failed: library "libprocessgroup.so" not found

Exempt-From-Owner-Approval: janitorial

Bug: 111307099
Test: builds, boots

Merged-In: Ia8bc5b447efa568fd1c822746919fa1496cc42a6
Change-Id: Ia8bc5b447efa568fd1c822746919fa1496cc42a6
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
diff --git a/tests/net/Android.mk b/tests/net/Android.mk
index f6f35fd..6850673 100644
--- a/tests/net/Android.mk
+++ b/tests/net/Android.mk
@@ -54,6 +54,7 @@
     libnativehelper \
     libpackagelistparser \
     libpcre2 \
+    libprocessgroup \
     libselinux \
     libui \
     libutils \