ART: Merge entries with same name and protect in MemMap dump.

This should make the MemMap dump less chatty and allow the
logger to keep more relevant output.

Bug: 20873174

(cherry picked from commit 17a924abde2b0f1f37f6008b451a0a75190c71ff)

Change-Id: I1748f57a1f149a5498b42ee246f13d2bf1e8c2f7
4 files changed