Memtrack HAL: Add stable AIDL implementation

Bug: 175021432
Test: adb shell dumpsys -l | grep android.hardware.memtrack.IMemtrack
Test: VtsHalMemtrackTargetTest
Change-Id: Ib6c634def4eeca62b0b2615dc7dc273183cda2b1
diff --git a/memtrack/aidl/default/memtrack-default.rc b/memtrack/aidl/default/memtrack-default.rc
new file mode 100644
index 0000000..1725cd0
--- /dev/null
+++ b/memtrack/aidl/default/memtrack-default.rc
@@ -0,0 +1,4 @@
+service vendor.memtrack-default /vendor/bin/hw/android.hardware.memtrack-service.example
+    class hal
+    user nobody
+    group system