aconfig: rename subcommand 'dump' -> 'dump-cache'

Rename the 'dump' subcommand to 'dump-cache' for better symmetry with
'create-cache', and to prepare for a potentially upcoming
'dump-storage' subcommand.

Keep 'dump' as an alias for 'dump-cache' for backwards compatibility.

Bug: N/A
Test: m
Change-Id: I521ce507985e4cf450ee1b8517993b798f11430c
diff --git a/tools/aconfig/src/main.rs b/tools/aconfig/src/main.rs
index fcc5ea5..437d124 100644
--- a/tools/aconfig/src/main.rs
+++ b/tools/aconfig/src/main.rs
@@ -106,7 +106,8 @@
                 .arg(Arg::new("out").long("out").default_value("-")),
         )
         .subcommand(
-            Command::new("dump")
+            Command::new("dump-cache")
+                .alias("dump")
                 .arg(Arg::new("cache").long("cache").action(ArgAction::Append))
                 .arg(
                     Arg::new("format")
@@ -114,7 +115,12 @@
                         .value_parser(|s: &str| DumpFormat::try_from(s))
                         .default_value("text"),
                 )
-                .arg(Arg::new("filter").long("filter").action(ArgAction::Append).help(HELP_DUMP_FILTER.trim()))
+                .arg(
+                    Arg::new("filter")
+                        .long("filter")
+                        .action(ArgAction::Append)
+                        .help(HELP_DUMP_FILTER.trim()),
+                )
                 .arg(Arg::new("dedup").long("dedup").num_args(0).action(ArgAction::SetTrue))
                 .arg(Arg::new("out").long("out").default_value("-")),
         )
@@ -254,7 +260,7 @@
             let path = get_required_arg::<String>(sub_matches, "out")?;
             write_output_to_file_or_stdout(path, &output)?;
         }
-        Some(("dump", sub_matches)) => {
+        Some(("dump-cache", sub_matches)) => {
             let input = open_zero_or_more_files(sub_matches, "cache")?;
             let format = get_required_arg::<DumpFormat>(sub_matches, "format")
                 .context("failed to dump previously parsed flags")?;