AOSP/Email and AOSP/UnfiedEmail - Added back call to uiaccounts.
+ Added android.permission.FOREGROUND_SERVICE for UnfiedEmail and changed the
  code accordingly to work with API level 28.

Bug: 138276176
Bug: 119499886

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

$ make -j 40
$ make UnifiedEmail -j
$ make Email -j
$ make EmailTests -j

$ ls -l out/target/product/marlin/testcases/Email/arm64/Email.apk out/target/product/marlin/testcases/EmailTests/arm64/EmailTests.apk
  -rw-r--r-- 1 rtenneti primarygroup 6275529 Aug 15 11:33 out/target/product/marlin/testcases/Email/arm64/Email.apk
  -rw-r--r-- 1 rtenneti primarygroup  389599 Aug 15 11:42 out/target/product/marlin/testcases/EmailTests/arm64/EmailTests.apk

$ adb install -r -d -g out/target/product/marlin/testcases/Email/arm64/Email.apk
$ adb install -r -d -g out/target/product/marlin/testcases/EmailTests/arm64/EmailTests.apk
$ adb shell am instrument -w com.android.email.tests
  Time: 6.543
  OK (157 tests)

$ atest EmailTests
  Summary
  -------
  EmailTests: Passed: 157, Failed: 0, Ignored: 0, Assumption Failed: 0
  All tests passed!

Change-Id: I6593b5dad3a5e79bba41a645f17e74af20d16a3c
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index e34a4fc..5dcd988 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -25,6 +25,7 @@
     <uses-permission android:name="com.android.email.permission.ACCESS_PROVIDER"/>
     <uses-permission android:name="com.android.email.permission.READ_ATTACHMENT"/>
     <uses-permission android:name="android.permission.NFC" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
 
     <!-- This needs to be present when we are doing unbundled releases. -->
     <uses-sdk android:targetSdkVersion="28" android:minSdkVersion="14" />
diff --git a/src/com/android/mail/widget/BaseWidgetProvider.java b/src/com/android/mail/widget/BaseWidgetProvider.java
index bbed266..00eacd7 100644
--- a/src/com/android/mail/widget/BaseWidgetProvider.java
+++ b/src/com/android/mail/widget/BaseWidgetProvider.java
@@ -214,6 +214,10 @@
 
         @Override
         protected Void doInBackground(final Void... params) {
+            return null;
+        }
+
+        protected Void onPostExecute(Boolean result) {
             for (int i = 0; i < mAppWidgetIds.length; ++i) {
                 // Get the account for this widget from preference
                 final String accountFolder = MailPrefs.get(mContext).getWidgetConfiguration(