Make all typedefs SOURCE retention

The default retention is CLASS, but the correct retention is SOURCE.
There is a metalava check for typedef annotations correctly, but that
check is currently disabled. This is part of the work required to
re-enable that check.

Bug: 309971481
Test: m checkapi
Change-Id: I386efea9321bd2adb2722710056b1d57dd5401f5
38 files changed