A2DP: SBC encoding counter errata

When the encoder interval is 20 milliseconds per tick for {44.1 kHz /
16 bits per sample / Stereo}, there were around three microseconds shift
every tick, but would cause one SBC frame mismatched after 20 seconds.
Here try to adjust the timeline to increase the accuracy by following
methods:

1. add the remainder back to the timeline when converting the time
   period to data size.
2. change the timestamp to be presented by values in 1/10 microseconds.

Bug: 149546181
Test: manually
Change-Id: Ic42b2f331628c44aa927c7b9e35562be1fa750c7