resolve merge conflicts of 177c610e7f to cw-e-dev
am: bd25fcdc02

* commit 'bd25fcdc02a94ec9f50fc431a3731484b9812e23':
  DO NOT MERGE releasetools: Support generating downgrade incremental OTAs.
diff --git a/target/product/core.mk b/target/product/core.mk
index d453303..abb4c05 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -33,7 +33,6 @@
     DownloadProviderUi \
     Email \
     ExactCalculator \
-    Exchange2 \
     ExternalStorageProvider \
     FusedLocation \
     InputDevices \