* core:ppc Fix java CoreTest/testMahalanobis

* core:ppc Fix warning unused variable on clang

* make sure that the matrix with more than INT_MAX elements is marked as non-continuous, and thus all the pixel-wise functions process it correctly (i.e. row-by-row, not as a single row, where integer overflow may occur when computing the total number of elements)

Found via `codespell`

* Introduces error throw for line drawn with THICKNESS=0

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

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

Check for empty objects via .area() is not a good practice due overflows

Revert of "Merge pull request #4014 from sgjava:opencv-sgjava" (reverted from commit 52fa55a7)