Revert "Use MAP_FIXED in remapNewHeap"

This reverts commit b385647984acb055cbfe55a509f5f5c2d151d4dc.
Dalvik :Increase the upper limit check for DexOpt Deps table

Increasing upper limit check for the Deps table as additonal
jars added causes the dalvik to crash while performing dexopt
on cached jar files. This is needed for passing cts test case
which is part of libcore.java.util.jar.DalvikExecTest class

Change-Id: I5431238839712499122eb35132599230d8610de8
CRs-Fixed:621955