Revert "Make VariableHandleScope consistent between 32 & 64 bit"

This reverts commit de7718db5a54cd0f67c650f12d0b757c9a9079f8.

Reason for revert: The change is not needed anymore since
    https://android-review.googlesource.com/983105 .
Reverting to the old code that has a little lower memory
usage on 32-bit targets.

Change-Id: I95437c53c1a219a19923d4912b34c2641e54220f
Test: Boot image compiled with dex2oat32 is unchanged.
Bug: 122373634
1 file changed