Fix unquickening logic for quickened input dexes

In the case where an input dex is already quickened (i.e.
obfuscation), do not attempt to unquicken it. This is done by
switching the quicken info table to the compact offset table (used by
cdex debug infos).

Added test.

Posssible to get a bit of extra savings by deleting the quicken info
num entries field.

Quicken filter size regression average on golem: -0.14%.

Bug: 72608794
Bug: 63756964
Test: test-art-host-gtest-dex2oat_test -j64
Change-Id: I5534a7509b4c718a9b959fa43b82bde857e0b59e