Revert "Fix exposing private messages files through attachments with a content URI."

This reverts commit 0d5452146c58aa9b938daffc88f8b03eb9aee58b.

Fix the Gif problem when we use an external keyboard, like Gboard

12-28 18:55:37.333  6995  6995 E MessagingApp: Assert.fail() called: Cannot send private file content://com.google.android.inputmethod.latin.fileprovider/content/tenor_gif/tenor_gif1485318298145763703.gif
12-28 18:55:37.333  6995  6995 E MessagingApp:  at com.android.messaging.ui.conversationlist.ShareIntentActivity.addSharedPartToDraft(Unknown Source:24)

Change-Id: I74eaa4b20f734d1ba9c1abd4ea7e215be72bfbfe
1 file changed