Fix clang-tidy warnings in camera.

* Add explicit keyword to conversion constructors.
Bug: 28341362
* Use const reference type for read-only parameters.
Bug: 30407689
* Use const reference type to avoid unnecessary copy.
Bug: 30413862
Test: build with WITH_TIDY=1

Change-Id: I71d3008da843ba5f1df1a73a320fb2af6ceffa16
Merged-In: I71d3008da843ba5f1df1a73a320fb2af6ceffa16
diff --git a/services/camera/libcameraservice/common/CameraModule.h b/services/camera/libcameraservice/common/CameraModule.h
index 36822c7..dbfaede 100644
--- a/services/camera/libcameraservice/common/CameraModule.h
+++ b/services/camera/libcameraservice/common/CameraModule.h
@@ -32,7 +32,7 @@
  */
 class CameraModule {
 public:
-    CameraModule(camera_module_t *module);
+    explicit CameraModule(camera_module_t *module);
     virtual ~CameraModule();
 
     // Must be called after construction