[Android] Log uncaught Java exceptions when running native tests.

testing/android/native_test/java/src/org/chromium/native_test/NativeTestInstrumentationTestRunner.java

Index: testing/android/native_test/java/src/org/chromium/native_test/NativeTestInstrumentationTestRunner.java
diff --git a/testing/android/native_test/java/src/org/chromium/native_test/NativeTestInstrumentationTestRunner.java b/testing/android/native_test/java/src/org/chromium/native_test/NativeTestInstrumentationTestRunner.java
index a7443134cb3431c0cc22ea81a4087f2b6261ed6b..f834d334e636a29c754b5b66619bf59c78b82772 100644
--- a/testing/android/native_test/java/src/org/chromium/native_test/NativeTestInstrumentationTestRunner.java
+++ b/testing/android/native_test/java/src/org/chromium/native_test/NativeTestInstrumentationTestRunner.java
@@ -168,6 +168,14 @@ public class NativeTestInstrumentationTestRunner extends Instrumentation {
                 }
                 mHandler.post(new ShardEnder(pid));
             }
+
+            @Override
+            public void uncaughtException(int pid, String stackTrace) {
+                mLogBundle.putString(Instrumentation.REPORT_KEY_STREAMRESULT,
+                        String.format("Uncaught exception in test process (pid: %d)%n%s%n",
+                                pid, stackTrace));
+                sendStatus(0, mLogBundle);
+            }
         });
 
         mHandler.post(new ShardStarter());