service/apt: Add and implement more service commands. (#6721)

* service/apt: Add and implement more service commands.

* service/apt: Implement power button.

* Address review comments and fix GetApplicationRunningMode bug.

src/core/hle/service/am/am.cpp

@@ -521,6 +521,11 @@ InstallStatus InstallFromNus(u64 title_id, int version) {
 #endif
 }
 
+u64 GetTitleUpdateId(u64 title_id) {
+    // Real services seem to just discard and replace the whole high word.
+    return (title_id & 0xFFFFFFFF) | (static_cast<u64>(TID_HIGH_UPDATE) << 32);
+}
+
 Service::FS::MediaType GetTitleMediaType(u64 titleId) {
     u16 platform = static_cast<u16>(titleId >> 48);
     u16 category = static_cast<u16>((titleId >> 32) & 0xFFFF);

src/core/hle/service/am/am.h

@@ -118,6 +118,13 @@ InstallStatus InstallCIA(const std::string& path,
  */
 InstallStatus InstallFromNus(u64 title_id, int version = -1);
 
+/**
+ * Get the update title ID for a title
+ * @param titleId the title ID
+ * @returns The update title ID
+ */
+u64 GetTitleUpdateId(u64 title_id);
+
 /**
  * Get the mediatype for an installed title
  * @param titleId the installed title ID