fix gradle build fail when app is referencing support-v4
fix gradle build fail when app is referencing support-v4

When app is still referencing legacy "support-v4", either directly
or indirectly (e.g. references leanback which references support-v4),
build fails due to missing "support-v4" in maven repository path.

The change add back the uploadArchives task for support-v4.

Change-Id: I5aea7304f9b68a8b70f8d6f1371d53fcbd3b1eff

aosp-mirror/platform_frameworks_support,androidx/androidx,aosp-mirror/platform_frameworks_support,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,aosp-mirror/platform_frameworks_support,AndroidX/androidx,aosp-mirror/platform_frameworks_support,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,aosp-mirror/platform_frameworks_support,AndroidX/androidx