Move setting maven group directly to each build.gradle.

Test: ./gradlew buildOnServer
Change-Id: If83e8d3d4bb8c9dd260f65c3898b6f0fa8ffc524
diff --git a/v7/appcompat/build.gradle b/v7/appcompat/build.gradle
index 5a14248..dbf96d6 100644
--- a/v7/appcompat/build.gradle
+++ b/v7/appcompat/build.gradle
@@ -1,3 +1,5 @@
+import android.support.LibraryGroups
+
 plugins {
     id("SupportAndroidLibraryPlugin")
 }
@@ -38,6 +40,7 @@
 supportLibrary {
     name = "Android AppCompat Library v7"
     publish = true
+    mavenGroup = LibraryGroups.SUPPORT
     inceptionYear = "2011"
     description = "The Support Library is a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren\'t a part of the framework APIs. Compatible on devices running API 14 or later."
     legacySourceLocation = true