Update released flagged apis rule

The aconfig command has been recently updated to fully specify the
output format instead of passing the keyword format (e.g., bool). This
change reflects the change in the aconfig tool.

Test: m art.module.public.api && inspect the generate released-flagged-apis-exportable.txt output
Change-Id: I620b7f34c346288ca87342448f50a0e90813304f

java/builder.go

@@ -277,7 +277,7 @@ var (
 
 	gatherReleasedFlaggedApisRule = pctx.AndroidStaticRule("gatherReleasedFlaggedApisRule",
 		blueprint.RuleParams{
-			Command: `${aconfig} dump --format bool ` +
+			Command: `${aconfig} dump-cache --format='{fully_qualified_name}={state:bool}' ` +
 				`--out ${out} ` +
 				`${flags_path} ` +
 				`${filter_args} `,