Improve javadoc description for recoverAndDeleteData()

Currently the javadoc does not mention that the files won't be
deleted if the recorder set mWipeOnError to false. Thus, add
more detail to the javadoc to improve the description.

Test: only change javadoc description
Change-Id: I24639007fcd57c55bcbda6b9a81736f0428e881d
1 file changed