Make sure that classpath fragment contents appear in make vars.

The source of truth for what jars are in BOOTCLASSPATH and
SYSTEMSERVERCLASSPATH is make; adding a classpath fragment in soong
with a new jar in the contents without having it declared in make
is wrong (excluding test apexes).

Bug: 191369843
Test: m nothing
Change-Id: Ifd313776ee7ad206031244534ed3870126e4f835

apex/systemserver_classpath_fragment_test.go

@@ -130,3 +130,54 @@ func TestSystemserverclasspathFragmentNoGeneratedProto(t *testing.T) {
 		`mysystemserverclasspathfragment`,
 	})
 }
+
+func TestSystemServerClasspathFragmentWithContentNotInMake(t *testing.T) {
+	android.GroupFixturePreparers(
+		prepareForTestWithSystemserverclasspathFragment,
+		prepareForTestWithMyapex,
+		dexpreopt.FixtureSetApexSystemServerJars("myapex:foo"),
+	).
+		ExtendWithErrorHandler(android.FixtureExpectsAtLeastOneErrorMatchingPattern(
+			`in contents must also be declared in PRODUCT_UPDATABLE_SYSTEM_SERVER_JARS`)).
+		RunTestWithBp(t, `
+			apex {
+				name: "myapex",
+				key: "myapex.key",
+				systemserverclasspath_fragments: [
+					"mysystemserverclasspathfragment",
+				],
+				updatable: false,
+			}
+
+			apex_key {
+				name: "myapex.key",
+				public_key: "testkey.avbpubkey",
+				private_key: "testkey.pem",
+			}
+
+			java_library {
+				name: "foo",
+				srcs: ["b.java"],
+				installable: true,
+				apex_available: ["myapex"],
+			}
+
+			java_library {
+				name: "bar",
+				srcs: ["b.java"],
+				installable: true,
+				apex_available: ["myapex"],
+			}
+
+			systemserverclasspath_fragment {
+				name: "mysystemserverclasspathfragment",
+				contents: [
+					"foo",
+					"bar",
+				],
+				apex_available: [
+					"myapex",
+				],
+			}
+		`)
+}