Fix a few bugs in java codegen

[jameseidson]

• Fix packet generation with multiple constraints
• Fix generation of >16 bit open enums
• update examples/android_ranging_oob.pdl

[hchataing]

1. New clippy warnings :/
2. Please mention in the commit message that the codegen issues are caused by the java generator

[jameseidson]

1. New clippy warnings :/

I don't see these warnings when running clippy locally, and when I try to make the suggested change I get a compiler error:

error[E0658]: use of unstable library feature `unsigned_is_multiple_of`
   --> pdl-compiler/src/backends/rust/decoder.rs:143:23
    |
143 |         if self.shift.is_multiple_of(8) {
    |                       ^^^^^^^^^^^^^^
    |
    = note: see issue #128101 <https://github.com/rust-lang/rust/issues/128101> for more information

Looks like the compiler is configured differently for local builds than it is for CI builds. Can you fix this?

[hchataing]

I have updated the Clippy rule to use the same version as the rust compiler in the Build rule.
That should prevent new warnings from popping up in the future.