AOSP/Email - Create an empty Bundle if originalExtras doesn't exit. Backporting the fix to fix NullPointerException.

+ Added "originalExtras = new Bundle();" change from cl/247540041

Bug: 135889250
Bug: 127320867

Test: manual - Ran the following tests on Pixel phone. Tested the email UI.

$ make -j 40
  -rw-r--r-- 1 rtenneti primarygroup 6371530 Jun 25 17:23 out/target/product/marlin/system/product/app/Email/Email.apk

$ make EmailTests -j
  -rw-r--r-- 1 rtenneti primarygroup 365023 Jun 25 17:49 out/target/product/marlin/testcases/EmailTests/arm64/EmailTests.apk

$ adb install -r out/target/product/marlin/system/product/app/Email/Email.apk

$ adb install -r out/target/product/marlin/testcases/EmailTests/arm64/EmailTests.apk

$ adb shell am instrument -w com.android.email.tests
  Time: 2.986
  OK (157 tests)

Change-Id: Ica9eb7ad3ddd11c752a526c2b1d5f086c74da283
Merged-In: Ica9eb7ad3ddd11c752a526c2b1d5f086c74da283
(cherry picked from commit 3150b66305bea67a83ce289c42c85efc669088d3)
diff --git a/src/com/android/email/activity/ComposeActivityEmailExternal.java b/src/com/android/email/activity/ComposeActivityEmailExternal.java
index a5cbe9d..a94313a 100644
--- a/src/com/android/email/activity/ComposeActivityEmailExternal.java
+++ b/src/com/android/email/activity/ComposeActivityEmailExternal.java
@@ -49,6 +49,9 @@
     Intent sanitizedIntent = getIntent();
     if (sanitizedIntent != null) {
       Bundle originalExtras = sanitizedIntent.getExtras();
+       if (originalExtras == null) {
+        originalExtras = new Bundle();
+      }
       sanitizedIntent.replaceExtras(new Bundle());
       copyStringExtraIfExists(ComposeActivity.EXTRA_SUBJECT, originalExtras, sanitizedIntent);
       copyStringExtraIfExists(ComposeActivity.EXTRA_TO, originalExtras, sanitizedIntent);