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/device2/Camera2Device.cpp b/services/camera/libcameraservice/device2/Camera2Device.cpp
index d74f976..462077a 100644
--- a/services/camera/libcameraservice/device2/Camera2Device.cpp
+++ b/services/camera/libcameraservice/device2/Camera2Device.cpp
@@ -930,7 +930,7 @@
 
 status_t Camera2Device::MetadataQueue::freeBuffers(
         List<camera_metadata_t*>::iterator start,
-        List<camera_metadata_t*>::iterator end)
+        const List<camera_metadata_t*>::iterator& end)
 {
     ATRACE_CALL();
     while (start != end) {
@@ -1045,7 +1045,7 @@
 }
 
 status_t Camera2Device::StreamAdapter::connectToDevice(
-        sp<ANativeWindow> consumer,
+        const sp<ANativeWindow>& consumer,
         uint32_t width, uint32_t height, int format, size_t size) {
     ATRACE_CALL();
     status_t res;