Add a log if the printing activity died unexpectly.

Bug: 27861927
Change-Id: I431ba996e113043c224039a62a76ae23e9c7494a
diff --git a/packages/PrintSpooler/src/com/android/printspooler/ui/PrintActivity.java b/packages/PrintSpooler/src/com/android/printspooler/ui/PrintActivity.java
index e7aebdd..c411186 100644
--- a/packages/PrintSpooler/src/com/android/printspooler/ui/PrintActivity.java
+++ b/packages/PrintSpooler/src/com/android/printspooler/ui/PrintActivity.java
@@ -320,6 +320,8 @@
                 mFileProvider, new RemotePrintDocument.RemoteAdapterDeathObserver() {
             @Override
             public void onDied() {
+                Log.w(LOG_TAG, "Printing app died unexpectedly");
+
                 // If we are finishing or we are in a state that we do not need any
                 // data from the printing app, then no need to finish.
                 if (isFinishing() || (isFinalState(mState) && !mPrintedDocument.isUpdating())) {