Revert of MediaPerceptionPrivate API impl and testing.

chromeos/dbus/proto/media_perception.proto

Index: chromeos/dbus/proto/media_perception.proto
diff --git a/chromeos/dbus/proto/media_perception.proto b/chromeos/dbus/proto/media_perception.proto
index c14ef236278c68b09fe2401ef4d14002bf5f1257..c7b78704e12b2b167bee6c72492aed6a1386c3b7 100644
--- a/chromeos/dbus/proto/media_perception.proto
+++ b/chromeos/dbus/proto/media_perception.proto
@@ -31,10 +31,11 @@
 message State {
   enum Status {
     STATUS_UNSPECIFIED = 0;  // Unused required default value for Proto enums.
-    UNINITIALIZED = 1;  // Media analytics working on loading configuration.
-    STARTED = 2;        // Analysis process running but not recieving frames.
-    RUNNING = 3;        // Analysis process running and injesting frames.
-    SUSPENDED = 4;      // Media analytics process waiting to be started.
+    TIMEOUT = 1;             // Unable to reach media analysis process.
+    UNINITIALIZED = 2;  // Media analytics working on loading configuration.
+    STARTED = 3;        // Analysis process running but not recieving frames.
+    RUNNING = 4;        // Analysis process running and injesting frames.
+    SUSPENDED = 5;      // Media analytics process waiting to be started.
   }
 
   // Note: RUNNING and SUSPENDED are the only two states which should be sent to