Revert "don't use /cache/dalvik-cache for now"

This reverts commit 077826c4b378d249d24e29863fa2f3c0a4b71217.

Change-Id: I33d6142c902fc2241f8ba4eec7fc1869ba0d20ea
Merge "Revert "don't use /cache/dalvik-cache for now"" into kitkat
Merge remote-tracking branch 'upstream/kitkat' into kitkat