pdl: Reorder canonical test files

Tag: #feature
Bug: 228306436
Test: atest pdl_tests pdl_rust_generator_tests_{le,be}
(cherry picked from https://android-review.googlesource.com/q/commit:fcb7d8c9b6f72118ad0cecc9b970d3df27184d3f)
Merged-In: Ia0c4e0049492c7dbbcbe861c5c5fd0fb9be11831
Change-Id: Ia0c4e0049492c7dbbcbe861c5c5fd0fb9be11831