add an Android example running on non-rooted Android phone #2698
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zhouwg
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along with the performance in Android based mobile/IoT device becomes more stronger and stronger, might be someone want to using librealsense on Android based device for PoC/product development activities. it's might be very convenient that using an Android based device to presenting some advanced CV/AI/ML technology.
according to issue2617(#2617)，it seems there are two major issues with librealsense on Android device: patch Android kernel; root privilege to access /dev/video* and /dev/bus/usb/*.
this is an example to illustrate the possibility that enable librealsense running on non-rooted Android based device. from the example in this PR, we could find that librealsense(v2.16.2+) should running VERY WELL on any Android device if Google could provide a customize AOSP which added the librealsense kernel patch in Android kernel and added some SELinux policy/rules for librealsense, or following the proposal in PR (#2489) to build a customized Android image.
source code of the example: https://github.com/IntelRealSense/librealsense/blob/d758e7f2154790ff6bd443916ff3c0a04797adae/wrappers/android/examples/irsa_example/app/src/main/java/com/android/irsa_example/MainActivity.java