cameraserver: Add watchdog timer for disconnect.

Bug: 228641945

Test: Add artifical delay of 2 seconds in disconnectImpl, see tombstone

Change-Id: I11254e04d9d883e839dc1a7eee309e249613957e
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>
(cherry picked from commit 48162a773f8a62f3f131a2740e6bed51a6be6e75)
diff --git a/services/camera/libcameraservice/common/Camera2ClientBase.h b/services/camera/libcameraservice/common/Camera2ClientBase.h
index 0dad50f..6e37589 100644
--- a/services/camera/libcameraservice/common/Camera2ClientBase.h
+++ b/services/camera/libcameraservice/common/Camera2ClientBase.h
@@ -20,6 +20,7 @@
 #include "common/CameraDeviceBase.h"
 #include "camera/CaptureResult.h"
 #include "utils/CameraServiceProxyWrapper.h"
+#include "CameraServiceWatchdog.h"
 
 namespace android {
 
@@ -176,6 +177,12 @@
 private:
     template<typename TProviderPtr>
     status_t              initializeImpl(TProviderPtr providerPtr, const String8& monitorTags);
+
+    binder::Status disconnectImpl();
+
+    // Watchdog thread
+    sp<CameraServiceWatchdog> mCameraServiceWatchdog;
+
 };
 
 }; // namespace android