Add full stop into blockedtext-reason-comment
The following patches should be merged immediately
after this one:
I66fbebe2f43484973fa060285e1b41efae499864
I13c7d94b050a38e9d5599493af34266029e97225
Bug: T372213
Change-Id: Ice859477e511b38f7bf6c051082d04f6c83a10e7