aflags: list: merge package and name into fully qualified name

Print the fully qualified name instead of splitting flag package and
flag name into separate columns. This aligns the output with the
expected input to `aflags enable <fully-qualified-name>` and makes it
easier to copy-and-paste the flag names.

Before this change:

  $ adb shell aflags list | head -n4
  android.app.admin.flags                   cross_user_suspension_enabled                                              false default read-write system
  android.app.admin.flags                   dedicated_device_control_enabled                                           false default read-write system
  android.app.admin.flags                   device_policy_size_tracking_enabled                                        false default read-write system
  android.app.admin.flags                   dumpsys_policy_engine_migration_enabled                                    false default read-write system

After this change:

  $ adb shell aflags list | head -n4
  android.app.admin.flags.cross_user_suspension_enabled                                                           false default read-write system
  android.app.admin.flags.dedicated_device_control_enabled                                                        false default read-write system
  android.app.admin.flags.device_policy_size_tracking_enabled                                                     false default read-write system
  android.app.admin.flags.dumpsys_policy_engine_migration_enabled                                                 false default read-write system

Bug: N/A
Test: adb shell aflags list
Change-Id: I3227c9c9c7355b5b0c1b75ada73b1a8f87d1be55
diff --git a/tools/aconfig/aflags/src/main.rs b/tools/aconfig/aflags/src/main.rs
index ef0195f..d5704e8 100644
--- a/tools/aconfig/aflags/src/main.rs
+++ b/tools/aconfig/aflags/src/main.rs
@@ -116,32 +116,28 @@
 }
 
 struct PaddingInfo {
-    longest_package_col: usize,
-    longest_name_col: usize,
+    longest_flag_col: usize,
     longest_val_col: usize,
     longest_value_picked_from_col: usize,
     longest_permission_col: usize,
 }
 
 fn format_flag_row(flag: &Flag, info: &PaddingInfo) -> String {
-    let pkg = &flag.package;
-    let p0 = info.longest_package_col + 1;
-
-    let name = &flag.name;
-    let p1 = info.longest_name_col + 1;
+    let full_name = flag.qualified_name();
+    let p0 = info.longest_flag_col + 1;
 
     let val = flag.value.to_string();
-    let p2 = info.longest_val_col + 1;
+    let p1 = info.longest_val_col + 1;
 
     let value_picked_from = flag.value_picked_from.to_string();
-    let p3 = info.longest_value_picked_from_col + 1;
+    let p2 = info.longest_value_picked_from_col + 1;
 
     let perm = flag.permission.to_string();
-    let p4 = info.longest_permission_col + 1;
+    let p3 = info.longest_permission_col + 1;
 
     let container = &flag.container;
 
-    format!("{pkg:p0$}{name:p1$}{val:p2$}{value_picked_from:p3$}{perm:p4$}{container}\n")
+    format!("{full_name:p0$}{val:p1$}{value_picked_from:p2$}{perm:p3$}{container}\n")
 }
 
 fn set_flag(qualified_name: &str, value: &str) -> Result<()> {
@@ -164,8 +160,7 @@
 fn list() -> Result<String> {
     let flags = DeviceConfigSource::list_flags()?;
     let padding_info = PaddingInfo {
-        longest_package_col: flags.iter().map(|f| f.package.len()).max().unwrap_or(0),
-        longest_name_col: flags.iter().map(|f| f.name.len()).max().unwrap_or(0),
+        longest_flag_col: flags.iter().map(|f| f.qualified_name().len()).max().unwrap_or(0),
         longest_val_col: flags.iter().map(|f| f.value.to_string().len()).max().unwrap_or(0),
         longest_value_picked_from_col: flags
             .iter()