Fix TelephonyRegistry's mListenLog.

The size of the LocalLog buffer was unintentionally reduced to 0 in
ag/12288380. Also fix minor formatting related in the dump code.

Test: make, dumpsys telephony.registry
Bug: 176052183
Change-Id: I68cc337bfeff6b728f68511477ffe49a9a7ea762
1 file changed