Revert "Remove mediarouter v7 support library from SDK."

This reverts commit 408c1846145bf99a821fe1fafc48ddbb5a2a6ad5.

Bug: 9425325
Change-Id: I340364c43f3040b454894e55a94be236ff999ce6
diff --git a/build/Android.mk b/build/Android.mk
index 028b2f5..6d798de 100644
--- a/build/Android.mk
+++ b/build/Android.mk
@@ -122,6 +122,7 @@
     android-support-v4 \
     android-support-v7-gridlayout \
     android-support-v7-appcompat \
+    android-support-v7-mediarouter \
     android-support-v13
 
 $(foreach lib, $(ANDROID_SUPPORT_LIBRARIES), $(eval $(call _package_sdk_library,$(lib))))
diff --git a/build/sdk.atree b/build/sdk.atree
index de2a524..ca79644 100644
--- a/build/sdk.atree
+++ b/build/sdk.atree
@@ -269,6 +269,17 @@
 frameworks/support/v7/appcompat/src/.readme                                                       extras/android/support/v7/appcompat/src/.readme
 ${OUT_DIR}/target/common/obj/PACKAGING/android-support-v7-appcompat_intermediates/android-support-v7-appcompat.jar    extras/android/support/v7/appcompat/libs/android-support-v7-appcompat.jar
 
+frameworks/support/v7/mediarouter/README.txt                                                       extras/android/support/v7/mediarouter/README.txt
+frameworks/support/v7/mediarouter/.project                                                         extras/android/support/v7/mediarouter/.project
+frameworks/support/v7/mediarouter/.classpath                                                       extras/android/support/v7/mediarouter/.classpath
+frameworks/support/v7/mediarouter/AndroidManifest.xml                                              extras/android/support/v7/mediarouter/AndroidManifest.xml
+frameworks/support/v7/mediarouter/project.properties                                               extras/android/support/v7/mediarouter/project.properties
+frameworks/support/v7/mediarouter/res                                                              extras/android/support/v7/mediarouter/res
+frameworks/support/v7/mediarouter/src/.readme                                                      extras/android/support/v7/mediarouter/src/.readme
+${OUT_DIR}/target/common/obj/PACKAGING/android-support-v7-mediarouter_intermediates/android-support-v7-mediarouter.jar    extras/android/support/v7/mediarouter/libs/android-support-v7-mediarouter.jar
+
+development/samples/Support7Demos                                                                 extras/android/support/samples/Support7Demos
+
 ##############################################################################
 # Tests Component
 ##############################################################################