Fix google-explicit-constructor warnings in frameworks/base

* Add explicit keyword to conversion constructors.
* Add NOLINT to implicit conversion constructors.

Bug: 28341362
Test: build with clang-tidy
Change-Id: Ie4d37072ab57d1662d18db4de1c8577247f43337
diff --git a/libs/hwui/renderthread/RenderTask.h b/libs/hwui/renderthread/RenderTask.h
index 89c3a7d..9ea671b 100644
--- a/libs/hwui/renderthread/RenderTask.h
+++ b/libs/hwui/renderthread/RenderTask.h
@@ -73,7 +73,7 @@
 
 class MethodInvokeRenderTask : public RenderTask {
 public:
-    MethodInvokeRenderTask(RunnableMethod method)
+    explicit MethodInvokeRenderTask(RunnableMethod method)
         : mMethod(method), mReturnPtr(nullptr) {}
 
     void* payload() { return mData; }