AAPT2: Error reporting through JNI.

Rather than relying on stderr being wired correctly.

Test: Tests for JNI integration in studio-master-dev.
Change-Id: I1c7e7130bc4e56d61de259a9596bee3a6b3520fb
diff --git a/tools/aapt2/Main.cpp b/tools/aapt2/Main.cpp
index 87fda16..1965ad9 100644
--- a/tools/aapt2/Main.cpp
+++ b/tools/aapt2/Main.cpp
@@ -19,6 +19,8 @@
 
 #include "androidfw/StringPiece.h"
 
+#include "Diagnostics.h"
+
 namespace aapt {
 
 // DO NOT UPDATE, this is more of a marketing version.
@@ -33,8 +35,8 @@
   return 0;
 }
 
-extern int Compile(const std::vector<android::StringPiece>& args);
-extern int Link(const std::vector<android::StringPiece>& args);
+extern int Compile(const std::vector<android::StringPiece>& args, IDiagnostics* diagnostics);
+extern int Link(const std::vector<android::StringPiece>& args, IDiagnostics* diagnostics);
 extern int Dump(const std::vector<android::StringPiece>& args);
 extern int Diff(const std::vector<android::StringPiece>& args);
 extern int Optimize(const std::vector<android::StringPiece>& args);
@@ -53,9 +55,11 @@
 
     android::StringPiece command(argv[0]);
     if (command == "compile" || command == "c") {
-      return aapt::Compile(args);
+      aapt::StdErrDiagnostics diagnostics;
+      return aapt::Compile(args, &diagnostics);
     } else if (command == "link" || command == "l") {
-      return aapt::Link(args);
+      aapt::StdErrDiagnostics diagnostics;
+      return aapt::Link(args, &diagnostics);
     } else if (command == "dump" || command == "d") {
       return aapt::Dump(args);
     } else if (command == "diff") {