Use StatsDimensionsValueParcel within statsd apex

Because statsd now uses StatsDimensionsValueParcel instead of
StatsDimensionsValue.h/c, statsd no longer has to depend on libservices.

Test: m -j
Test: atest StatsdHostTestCases#testBroadcastSubscriber
Bug: 148604617
Change-Id: I6d65383ccec99f4672d6575232981c0f6cc40fcf