In tutorial-1 fps meter enabled via layout.xml. Camera id is set to "any" via lauout.xml;
In tutorial-2 message moved ion the bottom of the screen.

OpenCV namespace added;
Default values for camera_id added;
Aditional constructor with cameraId added.
Resolution added to FPS message.

FPS meter added;
Camera switching posibility added;
Attributes loading for layout filed implemented.

(#2569) simplifying code to avoid Eclipse CDT editor confusion, removing warnings and typos in comments

All samples use application style in android manifest instead of system calls in onCreate event now.

New versions tries to search library in arm-v7a and Manager packages only.

All constants moved to android independent header file.

Linker problems on armeabi-v7a+NEON with Android 2.2 fixed;

Issue #2506 Unnecessary log printouts in OpenCV::camera fixed;
Native camera for MIPS Android 4.1.1 added.
Build script for camera updated.

- Adding Android SDK/ADT r21 compatibility;
- fixing stl headers path for new ndk;
- fixing native API level for Android projects