Skip listing containers that can't be listed

aosp/3390407 checked for existence of boot files before trying to list a container. We also need to check if the default value files are present. Catch any error when listing a container and log its failure reason.

Bug: 383287071
Change-Id: I2de6a5cd247a246f8b10ec683123c80ff3c1f9e0
Test: m
diff --git a/aconfigd/src/storage_files.rs b/aconfigd/src/storage_files.rs
index 844ad44..773cc69 100644
--- a/aconfigd/src/storage_files.rs
+++ b/aconfigd/src/storage_files.rs
@@ -180,10 +180,6 @@
         Ok(files)
     }
 
-    pub(crate) fn has_boot_copy(&self) -> bool {
-        self.storage_record.boot_flag_val.exists() && self.storage_record.boot_flag_info.exists()
-    }
-
     /// Constructor from a pb record
     pub(crate) fn from_pb(
         pb: &ProtoPersistStorageRecord,
diff --git a/aconfigd/src/storage_files_manager.rs b/aconfigd/src/storage_files_manager.rs
index d5aff16..46f2c8c 100644
--- a/aconfigd/src/storage_files_manager.rs
+++ b/aconfigd/src/storage_files_manager.rs
@@ -420,10 +420,17 @@
     pub(crate) fn list_all_flags(&mut self) -> Result<Vec<FlagSnapshot>, AconfigdError> {
         let mut flags = Vec::new();
         for storage_files in self.all_storage_files.values_mut() {
-            if !storage_files.has_boot_copy() {
-                continue;
+            match storage_files.list_all_flags() {
+                Ok(f) => {
+                    flags.extend(f);
+                }
+                Err(errmsg) => {
+                    debug!(
+                        "failed to list all flags for {}: {:?}",
+                        storage_files.storage_record.container, errmsg
+                    );
+                }
             }
-            flags.extend(storage_files.list_all_flags()?);
         }
         Ok(flags)
     }