Via Redmonk analyst Stephen O'Grady, we find this July 21, 2011 Reuters story by Sinead Carew that Motorola's patent portfolio may have been in play:
Billionaire investor Carl Icahn urged Motorola to shop around its patent portfolio to cash in on interest in wireless technology from companies like Google Inc and Apple Inc.
-Reuters,July 21, 2011
The story also includes this prescient sub-headline:
OPPORTUNITY FOR GOOGLE?