Fixes:
W idmap2d : overlay '/product/overlay/DocumentsUI__auto_generated_rro_product.apk' is not allowed to overlay resource 'bool/config_default_show_device_root' in target: <overlay> android:targetName "" does not match overlayable name "DocumentsUICustomization"
W idmap2d : failed to find resource 'bool/show_documents_root'
W idmap2d : overlay '/product/overlay/DocumentsUI__auto_generated_rro_product.apk' is not allowed to overlay resource 'string/default_root_uri' in target: <overlay> android:targetName "" does not match overlayable name "DocumentsUICustomization"
E idmap2d : no resources were overlaid
Remove unused overlays while we are at it.
Change-Id: Icf48bb9644bcfd2ca2c1c5681623f4f7c762bf35
