[CallActivity] proximity logs max range
[resources] created encryption handshake sound (david)

  * This is part of issue #54.
[SimlarService] now plays sound and mutes microphone while zrtp handshake

  * This is part of issue #54.
[SoundEffectManager] now sets android in-call-mode during call

  * This is a workaround for speaker enabling shortly during encryption handshake.

  * This is part of issue #54.
[CallActivity] now showes CallStatus: encrypting

  * This is part of issue #54.
[SoundEffectManager] added log showing play and preparation time

  * This is part of issue #54.
[SimlarService] now prepares encryption handshake sound on new call

  * This is part of issue #54.
[CallActivity] now sets microphone and speaker buttons on SimlarCallState change

  * This is part of issue #54.
[Volumes] added microphoneStatus: DISABLED, MUTED, ON

  * This is part of issue #54.
Merge pull request #90 from simlar/encryption-sound-pullrequest

Encryption Sound