camera: Support exposing aux camera to apps

Original change:

Author: Sauhard Pande <sauhardp@codeaurora.org>
Date:   Thu Jul 21 18:23:21 2016 -0700

    Camera: Expose Aux camera to apps present in the whitelist

    Issue:
    3rd party apk cannot handle additional aux camera and may cause crash,
    Mono camera doesnt support all capabilities of HAL3 causing CTS issue.

    Fix:
    1. Expose aux camera to apps present in the whitelist
    2. ignore the availabe/unavailable status update for aux camera
    3. returning exception for open request for bad cameraid

    Change-Id: I15910154c6df205e6d4e00bfad30a00c9e3d5bee
    CRs-Fixed: 1086937

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Forward-ported to Q and squashed with the following changes:

Author: Rashed Abdel-Tawab <rashed@linux.com>
Date:   Sat Mar 24 13:20:52 2018 -0400

    camera: Check if aux camera whitelist is set before restricting cameras

    Some devices have a fully featured 3rd camera and adding 20+ camera apps
    to the whitelist is impossible due to the string length limit on
    systemprops. Add a check to see if the prop is even set, and if not,
    check if the blacklist property is set and mark those apps to hide the
    3rd camera from. If a package is not part of the blacklist, just restore
    the original behaviour and expose all the cameras to the app.

    Change-Id: I6c3b33c077e8710c73b5d0fa28e1b017d6c43a58

Author: Paul Keith <javelinanddart@gmail.com>
Date:   Fri Feb 8 08:42:33 2019 -0600

    Camera: Simplify code for Aux/Mono white and black lists

    Change-Id: I20c5454385d4d830a9a4d61926807a7eb1407c95

Change-Id: I15910154c6df205e6d4e00bfad30a00c9e3d5bee