Moves ui-material, ui-material-icons-core, and ui-material-icons-extended to androidx.compose.material

This CL does not touch package names, or directory structure - only the maven group.

Bug: b/160233169
Test: ./gradlew bOS
Change-Id: I2e5cbf4e0cae3f0453db7d89507c8ee392c33935

diff --git a/ui/ui-material/icons/core/build.gradle b/ui/ui-material/icons/core/build.gradle
index 5c8f1d1..9259547 100644
--- a/ui/ui-material/icons/core/build.gradle
+++ b/ui/ui-material/icons/core/build.gradle

@@ -40,7 +40,7 @@
     name = "AndroidX Core Material Icons"
     publish = Publish.SNAPSHOT_AND_RELEASE
     mavenVersion = LibraryVersions.UI
-    mavenGroup = LibraryGroups.UI
+    mavenGroup = LibraryGroups.Compose.MATERIAL
     inceptionYear = "2020"
     description = "AndroidX Core Material Icons"
 }