Remove javaFixtureFactory

Replaces uses of javaFixtureFactory with prepareForJavaTest and removes
the unused javaFixtureFactory.

Bug: 182885307
Test: m nothing
Change-Id: I809772d14af2af211b9e15ad676fbdc06b07cd46
diff --git a/java/dexpreopt_bootjars_test.go b/java/dexpreopt_bootjars_test.go
index 9db53fc..d78651d 100644
--- a/java/dexpreopt_bootjars_test.go
+++ b/java/dexpreopt_bootjars_test.go
@@ -43,12 +43,12 @@
 		}
 	`
 
-	result := javaFixtureFactory.
-		Extend(
-			PrepareForTestWithJavaSdkLibraryFiles,
-			FixtureWithLastReleaseApis("foo"),
-			dexpreopt.FixtureSetBootJars("platform:foo", "platform:bar", "platform:baz"),
-		).RunTestWithBp(t, bp)
+	result := android.GroupFixturePreparers(
+		prepareForJavaTest,
+		PrepareForTestWithJavaSdkLibraryFiles,
+		FixtureWithLastReleaseApis("foo"),
+		dexpreopt.FixtureSetBootJars("platform:foo", "platform:bar", "platform:baz"),
+	).RunTestWithBp(t, bp)
 
 	dexpreoptBootJars := result.SingletonForTests("dex_bootjars")
 	rule := dexpreoptBootJars.Output(ruleFile)