Fix/opensles earpiece

requested review from @smorlat

assigned to @SylvainBerfini

added 2 commits

• ace01afc - 1 commit from branch master
• 5eb66037 - Improved notifySoundcardUsage() to also handle playback sound card

Compare with previous version

mentioned in merge request linphone-sdk!4035 (closed)

added 2 commits

• d56b83cb - 1 commit from branch master
• 2cf9f49f - Improved notifySoundcardUsage() to also handle playback sound card

Compare with previous version

closed