Add method profiling support to DDMS.

New button allows to start/stop tracing. When clicking stop, DDMS downloads
the trace file and starts Traceview.

Also refactored some common parts of the HPROF and tracing handlers into a
common class. The goal is to have a default, extensible implementation
of the HPROF handler that DDMS and the plug-in can reuse. This will reduce
duplicated code.

Change-Id: Ifc48926c7f6f1c3ea49a4aa94053664be83cbb06
diff --git a/eclipse/scripts/create_ddms_symlinks.sh b/eclipse/scripts/create_ddms_symlinks.sh
index a5b20a8..87cdf68 100755
--- a/eclipse/scripts/create_ddms_symlinks.sh
+++ b/eclipse/scripts/create_ddms_symlinks.sh
@@ -70,7 +70,7 @@
     load.png \
     pause.png play.png pull.png push.png \
     save.png \
-    thread.png \
+    thread.png tracing_start.png tracing_stop.png \
     up.png \
     v.png \
     w.png warning.png ; do