Modify disabled flags to be exposed in keep-flagged-apis

Currently, keep-flagged-apis filters flags that are disabled (so that
the apis associated with the disabled flags are not exposed in the
"exportable" stubs), but sdk_with_runtime_apis product builds require
disabled flagged apis to be exposed.

Filtering of the flags should be done by aconfig, and keep-flagged-apis
should only convert the list of flags to the metalava-consumable format.

Test: lunch sdk_with_runtime_apis-trunk_staging-eng && m sdk dist and observe outputs
Bug: 371248797
Change-Id: If1622a6b81bc69a99e8f89c60a11ebec7899b95b
diff --git a/java/builder.go b/java/builder.go
index e5d5109..895ddb6 100644
--- a/java/builder.go
+++ b/java/builder.go
@@ -301,7 +301,7 @@
 
 	gatherReleasedFlaggedApisRule = pctx.AndroidStaticRule("gatherReleasedFlaggedApisRule",
 		blueprint.RuleParams{
-			Command: `${aconfig} dump-cache --dedup --format='{fully_qualified_name}={state:bool}' ` +
+			Command: `${aconfig} dump-cache --dedup --format='{fully_qualified_name}' ` +
 				`--out ${out} ` +
 				`${flags_path} ` +
 				`${filter_args} `,