Fix/suppress aapt/aapt2 google-explicit-constructor warnings

* Add explicit to conversion constructors/operators
* Use NOLINT or NOLINTNEXTLINE to suppress warnings on intended converters

Bug: 28341362
Test: make with WITH_TIDY=1 DEFAULT_GLOBAL_TIDY_CHECKS=-*,google-explicit-constructor
Change-Id: Ie02101ea7c422e8add535c111a30a2f21ead0ace
diff --git a/tools/aapt2/cmd/Compile.cpp b/tools/aapt2/cmd/Compile.cpp
index 0b43c5d..7144985 100644
--- a/tools/aapt2/cmd/Compile.cpp
+++ b/tools/aapt2/cmd/Compile.cpp
@@ -645,7 +645,7 @@
 
 class CompileContext : public IAaptContext {
  public:
-  CompileContext(IDiagnostics* diagnostics) : diagnostics_(diagnostics) {
+  explicit CompileContext(IDiagnostics* diagnostics) : diagnostics_(diagnostics) {
   }
 
   PackageType GetPackageType() override {