Fix NPE on MultiConversationNotificationState

Use the most recent notification's state to print out log because
mContent is null in case of a notification for multiple messages in at
least 2 different conversations.
And no need sanitizePII() since this log is only for VERBOSE already.

Test: 1) adb shell setprop log.tag.MessagingAppNotif VERBOSE
      2) Receive SMS from different senders

Signed-off-by: Taesu Lee <taesu82.lee@samsung.com>
Change-Id: Ie300620f0014577ca65b9a7e3a4c397a39717992
1 file changed