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/PatchCache.h b/libs/hwui/PatchCache.h
index 387f79a..b9eda44 100644
--- a/libs/hwui/PatchCache.h
+++ b/libs/hwui/PatchCache.h
@@ -51,7 +51,7 @@
 
 class PatchCache {
 public:
-    PatchCache(RenderState& renderState);
+    explicit PatchCache(RenderState& renderState);
     ~PatchCache();
     void init();