Pass pctx and ctx to NewRuleBuilder instead of RuleBuilder.Build,
and don't pass ctx to RuleBuilderCommand.BuiltTool. Follows the
changes in I63e6597e19167393876dc2259d6f521363b7dabc.
Test: m checkbuild
Change-Id: I5d11e07ae1a24a967e379c151f4f5d7d188c6cc0
Bug: 130787336
Test: m oemaids_header_gen oemaids_headers passwd group
Test: Set TARGET_FS_CONFIG_GEN to a list of paths
Change-Id: I5186b378fea8865f46cfd891420ba576f36e2565