Revert "Remove hidden System.arraycopy(byte[]...."

This reverts commit 90d8a1f75f5fd02a49048410ede109978bee799e.

Reason for revert: Possible performance regression. Reverted to see if b/130034718 is
improved.

Change-Id: Iaa41f95f2cc83d0e868ffc6b28b1896689c04c4a
1 file changed