Add a new activity library to update_prebuilts.py.

Test: None
Change-Id: Idf430dfc925838a2c010e015928f7f195c9a1aae
diff --git a/update_prebuilts/update_prebuilts.py b/update_prebuilts/update_prebuilts.py
index e7943e7..e9f110b 100755
--- a/update_prebuilts/update_prebuilts.py
+++ b/update_prebuilts/update_prebuilts.py
@@ -124,11 +124,13 @@
     'androidx.remotecallback:remotecallback-processor': {'name':'androidx.remotecallback_remotecallback-processor', 'path':'androidx/remotecallback/remotecallback-processor', 'host':True},
     'androidx.versionedparcelable:versionedparcelable': {'name':'androidx.versionedparcelable_versionedparcelable', 'path':'androidx/versionedparcelable'},
     'androidx.vectordrawable:vectordrawable-animated': {'name':'androidx.vectordrawable_vectordrawable-animated', 'path':'androidx/vectordrawable/vectordrawable-animated'},
+    'androidx.activity:activity': {'name':'androidx.activity_activity', 'path':'androidx/activity/activity'},
     'androidx.annotation:annotation': {'name':'androidx.annotation_annotation', 'path':'androidx/annotation/annotation'},
     'androidx.asynclayoutinflater:asynclayoutinflater': {'name':'androidx.asynclayoutinflater_asynclayoutinflater', 'path':'androidx/asynclayoutinflater/asynclayoutinflater'},
     'androidx.car:car': {'name':'androidx.car_car', 'path':'androidx/car/car'},
     'androidx.car:car-cluster': {'name':'androidx.car_car-cluster', 'path':'androidx/car/car-cluster'},
     'androidx.collection:collection': {'name':'androidx.collection_collection', 'path':'androidx/collection/collection'},
+    'androidx.concurrent:futures': {'name':'androidx.concurrent_futures', 'path':'androidx/concurrent/futures'},
     'androidx.core:core': {'name':'androidx.core_core', 'path':'androidx/core/core'},
     'androidx.contentpaging:contentpaging': {'name':'androidx.contentpaging_contentpaging', 'path':'androidx/contentpaging/contentpaging'},
     'androidx.coordinatorlayout:coordinatorlayout': {'name':'androidx.coordinatorlayout_coordinatorlayout', 'path':'androidx/coordinatorlayout/coordinatorlayout'},