Revert "[res] Start using ftl::SmallVector<> where it's most useful"

This reverts commit c4dadee1.

Reason for revert: There's a bunch of crashes coming from SetConfigurations() method, let's try to go back to a regular vector to test if this was the reason

Test: build, boot, atest libandroidfw_tests
Bug: 384153624
Flag: EXEMPT revert of a refactoring

Change-Id: I12a067c6344a6bc284f08b098bfcf1db7b6995aa