'mFramesCouner' -> 'mFramesCounter'

* Remove a forward method in dnn::Layer

* Add a test

* Fix tests

* Mark multiple dnn::Layer::finalize methods as deprecated

* Replace back dnn's inputBlobs to vector of pointers

* Remove Layer::forward_fallback from CV_OCL_RUN scopes

* Add Java overloads for each default argument

* Add "fisheye_" prefix for cv::fisheye:: functions and enums

- properly detect Android SDK support of Ant/Gradle projects
- divide processing of And/Gradle based projects

- Recommended compiler checks:
  - GCC: CV_GCC
  - Clang: CV_CLANG
- fixed problem with CMAKE_CXX_COMPILER_ID=Clang/AppleClang mess on MacOSX
  Details: cmake --help-policy CMP0025
- do not declare Clang as GCC compiler

- missing 'module'
- fixed '\r\n' EOL handling (blocked by '$' regex)

about BYPRODUCTS bin/opencv-340.jar

For using 'OpenCV for Android SDK' with Android Studio projects.

* add (untested) JavaCamera2View class

* initial fixes

* minor cleanup

* exclude JavaCamera2View from build for older SDK version

* fix method name typo

* add asserts + sanity checks

* fix preview format checks

* fix the memory leak

* export cvtTwoPlaneYUVtoBGR for Java usage

* add handling for two-plane YUV frames (C wrapper still missing)

* add two-plane cvtColor helper function

* fix warnings

* actually use the new cvtColorTwoPlane helper func

* fix wrong output matrix size

* fix wrong conversion type

* simplify method signature, add error condition

* minor fixes to Mat types

* remove leftover semaphore from camera api 1

* android: JavaCamera2View minor refactoring

- re-apply Java code style
- imports cleanup
- dump exceptions information

* android: JavaCamera2View: pause/resume fixes

* android: JavaCamera2View: fix mScale

Found via `codespell`

Documentation generation refactoring (#10621)

* Documentation build updates:

- disable documentation by default, do not add to ALL target
- combine Doxygen and Javadoc
- optimize Doxygen html

* javadoc: fix path in build directory

* cmake: fix "Documentation" status line

- fix imports override.
  Problem is observed with BoostDesc.

- add Ptr<> handling (constructor is protected from other packages).
  Observed in ximgproc:
      Ptr<StereoMatcher> createRightMatcher(Ptr<StereoMatcher> matcher_left)"
  where, "StereoMather" is from another package (calib3d)

intermediate commit (to simplify code review)

Adding capability to parse subsections of a byte array in Java bindings (#10489)

* Adding capability to parse subsections of a byte array in Java bindings. (Because Java lacks pointers. Therefore, reading images within a subsection of a byte array is impossible by Java's nature and limitations. Because of this, many IO functions in Java require additional parameters offset and length to define, which section of an array to be read.)

* Corrected according to the review. Previous interfaces were restored, instead internal interfaces were modified to provide subsampling of java byte arrays.

* Adding tests and test related files.

* Adding missing files for the test.

* Simplified the test

* Check was corrected according to discussion. An OutOfRangeException will be thrown instead of returning.

* java: update MatOfByte implementation checks / tests

Bitwise "and false" is always false.

OpenCV 3.4.0-rc

Support @deprecated tag in java wrappers (#9698)

Add Android Mat constructor with support for native buffer (#10050)

for non-ANDROID platforms

Previous commit, 6f39f9a6, tries to fix the color issue for emulator. But the condition for detecting emulator is incomplete, e.g. it stops working for emulators using Google Play, whose Build.BRAND=="google". https://stackoverflow.com/a/21505193 shows a more accurate condition for this.