Split Navigation Fragment support from Runtime

Navigation Runtime should be a general framework that
can support any type of NavHost. Make this more formal
by splitting the Fragment support into its own module.

Test: existing tests pass
BUG: 72562173
Change-Id: If4bb809a2fd738f3f5f66b2cd3bbfb2bfca1faae
diff --git a/navigation/fragment/build.gradle b/navigation/fragment/build.gradle
new file mode 100644
index 0000000..0f728f3
--- /dev/null
+++ b/navigation/fragment/build.gradle
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import static android.support.dependencies.DependenciesKt.*
+import android.support.LibraryGroups
+import android.support.LibraryVersions
+import android.support.SupportLibraryExtension
+
+plugins {
+    id("SupportAndroidLibraryPlugin")
+}
+
+dependencies {
+    api(SUPPORT_FRAGMENTS)
+    api(project(":navigation:runtime"))
+
+    testImplementation(JUNIT)
+    testImplementation(MOCKITO_CORE)
+    testImplementation(TEST_RUNNER)
+
+    androidTestImplementation(project(":navigation:testing"))
+    androidTestImplementation(TEST_RUNNER)
+    androidTestImplementation(ESPRESSO_CORE)
+}
+
+supportLibrary {
+    name = "Android Navigation Fragment"
+    publish = true
+    mavenVersion = LibraryVersions.NAVIGATION
+    mavenGroup = LibraryGroups.NAVIGATION
+    inceptionYear = "2017"
+    description = "Android Navigation-Fragment"
+    url = SupportLibraryExtension.ARCHITECTURE_URL
+}