Merge voice and timer options into a single "no-hands shutter" option

... and add a first-use hint to VS listing the hotwords

Usage of handsfree modes can be made continuous by flipping a switch
in the settings pane. The default behavior is to reset the shutter
mode to normal after a picture is taken

Change-Id: I271c7ba71f320e19be5d1a6a8d98dafeb4b8385a
Camera: Set untranslatable

Change-Id: I37fcb36534b73dfb163affb1e81c165808b6d6ec
Update German translation

Change-Id: I881dc44421160979fc1185302aa1b2e0ba3dab35
Fix NPE in SecureCameraActivity init

Change-Id: I2632d7baff0e08c0533157b149972466cedb679b
Camera: Update timer and voice activation drawables

Replace drawables with newer version with proper
size, shadows etc.

Change-Id: I6c20403a6645463f86ac75190c0be74705cd1554
Camera: Update German translation

Patch Set 1:   * add missing strings
               * some cleanup

Change-Id: I07b0f8ae4deb3b67258595d5046c22933738e657
Camera: Update German translation

Change-Id: If9ea824ee8403196be0c8a29f09720f02e6a5a5c
Camera: Update German translation

Forgot one value in http://review.cyanogenmod.org/#/c/43302/

Change-Id: I004f2f4d44bc8f0286a8cc212f04748b2c078f84