Upgrade pdl-compiler to 0.1.6 am: b32d1823b4

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pdl-compiler/+/2705926

Change-Id: Ied784d8bd5c1a364162a40f2d7c0a44136c0d524
Signed-off-by: Automerger Merge Worker <[email protected]>