Make container mandatory in aconfig_declarations.

Bug: 330354107
Test: Unit test and CI.

Ignore-AOSP-First: It is easier to detect all the missing ones in internal
master.
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:e916a2c758d2a95037d1d366e7cd0e10d241d510)
Merged-In: I4ab4271c67a35d0fdcc0b57c27260e29fb7dea56
Change-Id: I4ab4271c67a35d0fdcc0b57c27260e29fb7dea56
diff --git a/java/sdk_library_test.go b/java/sdk_library_test.go
index 0f163e6..34c63ac 100644
--- a/java/sdk_library_test.go
+++ b/java/sdk_library_test.go
@@ -1715,6 +1715,7 @@
 		aconfig_declarations {
 			name: "bar",
 			package: "com.example.package",
+			container: "com.android.foo",
 			srcs: [
 				"bar.aconfig",
 			],