MediaMetrics: Move LimitProcessMemory to libmediautils

Eliminates the need for libmedia in media.metrics, cutting
RSS nearly in half.

Test: adb shell showmap '$(pgrep -f media.metrics)'
Test: adb shell showmap '$(pgrep -f media.extractor)'
Bug: 152256321
Change-Id: Id8aae66de84e712915888422b7372fd2b880570d
diff --git a/media/utils/Android.bp b/media/utils/Android.bp
index b7037e9..e3f1e44 100644
--- a/media/utils/Android.bp
+++ b/media/utils/Android.bp
@@ -19,6 +19,7 @@
         "AImageReaderUtils.cpp",
         "BatteryNotifier.cpp",
         "ISchedulingPolicyService.cpp",
+        "LimitProcessMemory.cpp",
         "MemoryLeakTrackUtil.cpp",
         "ProcessInfo.cpp",
         "SchedulingPolicyService.cpp",