Hall Liu d4d2a8a658 Add setting and logging for RTT ...

Add a system setting to store preferred RTT mode for calls. Add logging
for RTT in Telecom base classes.

Bug: 63934808
Test: manual
Change-Id: Ie26fac800931604379bbe7b8abfed7caa8c0236d

2018-02-05 11:47:30 -08:00

124 KiB

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