aconfig: give commands ownership of all arguments

Pass the Cache argument to command::create_<lang>_lib functions by value
instead of by reference, to align with other commands.

The intended ownership flow is as follows:

  - main creates objects based on command line arguments
  - main hands commands ownership of the objects
  - command processes the objects
  - command gives main ownership of any generated output
  - main writes the output to file

Rationale: commands.rs is a unit testable version of main, and to the
rest of aconfig, acts as the top level entry point; main.rs exists only
to parse command line arguments and perform I/O.

Bug: 283910447
Test: atest aconfig.test
Change-Id: I1e1dea7da8ecc2bb6e2f7ee4a6df64562c148959
diff --git a/tools/aconfig/src/main.rs b/tools/aconfig/src/main.rs
index 1d2ec95..c07bcf3 100644
--- a/tools/aconfig/src/main.rs
+++ b/tools/aconfig/src/main.rs
@@ -125,7 +125,7 @@
             let file = fs::File::open(path)?;
             let cache = Cache::read_from_reader(file)?;
             let dir = PathBuf::from(get_required_arg::<String>(sub_matches, "out")?);
-            let generated_file = commands::create_java_lib(&cache)?;
+            let generated_file = commands::create_java_lib(cache)?;
             write_output_file_realtive_to_dir(&dir, &generated_file)?;
         }
         Some(("create-cpp-lib", sub_matches)) => {
@@ -133,7 +133,7 @@
             let file = fs::File::open(path)?;
             let cache = Cache::read_from_reader(file)?;
             let dir = PathBuf::from(get_required_arg::<String>(sub_matches, "out")?);
-            let generated_file = commands::create_cpp_lib(&cache)?;
+            let generated_file = commands::create_cpp_lib(cache)?;
             write_output_file_realtive_to_dir(&dir, &generated_file)?;
         }
         Some(("create-rust-lib", sub_matches)) => {
@@ -141,7 +141,7 @@
             let file = fs::File::open(path)?;
             let cache = Cache::read_from_reader(file)?;
             let dir = PathBuf::from(get_required_arg::<String>(sub_matches, "out")?);
-            let generated_file = commands::create_rust_lib(&cache)?;
+            let generated_file = commands::create_rust_lib(cache)?;
             write_output_file_realtive_to_dir(&dir, &generated_file)?;
         }
         Some(("dump", sub_matches)) => {