Revert "Add Statsdhelper and Metric Collectors"

This reverts commit 88083dba.

Reason for revert:  broke pi-dev-plus-aosp because it is making collector-device-lib a platform API, thus forbidding SystemAppJankTests to link with it

Change-Id: Ia8b4e4dbd886bd009faaa9a71fc94b62d7ba5b5c
Merged-In: I5af3d0203329e025a8deb0c2f4bda1f2dbe96b35
Merged-In: I20d05b4a65051a702e2af0e1db0a553e31af99e9