Implement ProgramSelector at HIDL layer.

No front-end implementation yet.

Bug: b/32621193
Test: VTS
Change-Id: I48f034e709254836cad35bbeb4285c3c42a9e1cd
diff --git a/broadcastradio/1.1/default/VirtualProgram.h b/broadcastradio/1.1/default/VirtualProgram.h
index 303513f..a4fd72c 100644
--- a/broadcastradio/1.1/default/VirtualProgram.h
+++ b/broadcastradio/1.1/default/VirtualProgram.h
@@ -26,7 +26,7 @@
 namespace implementation {
 
 struct VirtualProgram {
-    uint32_t channel;  // TODO(b/32621193): Station Selector
+    ProgramSelector selector;
 
     std::string programName = "";
     std::string songArtist = "";