Implement storage files in Java

This change implements storage files in java to remove the dependencies
on JNI.

Bug: 352078117
Test: atest aconfig_storage_file.test.java

Change-Id: I34438576d09d0aa31eabc60f472e71cebf1552a0

tools/aconfig/aconfig_storage_file/Android.bp

@@ -137,3 +137,12 @@ cc_library {
     min_sdk_version: "29",
     double_loadable: true,
 }
+
+// storage file parse api java cc_library
+java_library {
+    name: "aconfig_storage_file_java",
+    srcs: [
+        "srcs/**/*.java",
+    ],
+    sdk_version: "core_current",
+}