changed line281 -> line220
Presentation:
because line 220 give the globle var mDetectorType,and in line 230 it will be compared with mDeteorType !!!  it will never be unequal ~
fix:
change mDetectorType(previous globle var) to a new local val tmpDetectorType

super.onPause() call moved to begining of onPause method according Google recomandations.

FpsMeter class removed from Image Manipulations and Face Detection examples as unused code.

(#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.

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

Face detection package name replaced on org.opencv.facedetect for consistency with Google Play package.

Memory leak in color-blob-detection sample fixed;
Default face size in face-detection is set to 20%;
Error handling improved;
Some possible mat leak fixed;
Manager verison and engine interface version incremented to fix incompatibilities;
Docs updated;

Some unification done to simplify camera switching.

(cherry picked from commit 067744d0)

(cherry picked from commit bd12f636)
Signed-off-by: Andrey Kamaev <andrey.kamaev@itseez.com>

(cherry picked from commit 47b96407)
Signed-off-by: Andrey Kamaev <andrey.kamaev@itseez.com>