Add missing transitive dependencies

Add android-support-v7-palette to SystemUI for
android-support-v7-mediarouter

Bug: 36902714
Test: m -j ANDROID_COMPILE_WITH_JACK=false checkbuild
Change-Id: I6aa18380fa338a01f73381ab0a3259ff94173ce1
(cherry picked from commit 2560663a1ed71b041e2de06918908a8f47153250)
1 file changed