AndroidX updates

app/build.gradle

@@ -324,11 +324,11 @@ dependencies {
 
     def startup_version = "1.1.0"
     def annotation_version_experimental = "1.2.0"
-    def core_version = "1.7.0" // 1.8.0-beta01 / 1.9.0-alpha01
+    def core_version = "1.7.0" // 1.8.0-beta01 / 1.9.0-alpha03
     def shortcuts_version = "1.0.0"
     def appcompat_version = "1.4.1" // 1.6.0-alpha01
     def emoji_version = "1.2.0-alpha04"
-    def activity_version = "1.4.0" // 1.5.0-beta01 / 1.6.0-alpha01
+    def activity_version = "1.4.0" // 1.5.0-beta01 / 1.6.0-alpha03
     def fragment_version = "1.4.1" // 1.5.0-beta01
     def windows_version = "1.0.0" // 1.1.0-alpha01
     def webkit_version = "1.4.0"