User space needs to know if binder transactions occurred to frozen processes. Introduce a new BINDER_GET_FROZEN ioctl and keep track of transactions occurring to frozen proceses. Also, allow async transactions toward frozen processes and improve error hendling. Bug: 143717177 Test: atest testBinderLib Signed-off-by: Marco Ballesio <balejs@google.com> Change-Id: I9ee1c2e5fe3d4ab31fc1a137d840bd4cd38a8704