[Android] Update ui module structure. (#706)

* Remove redundant code for segmentation.

* Classification Documentation and example improvement.

* Ocr Documentation and example improvement.

* 1.detection、face、seg module add "svPreview.enableCamera();".
2.java/android add fastdepolyUi module.

* examples/vision/ to add OCRv3.

* Modify UI directory name.

* Refresh examples\vision,change OCR README.md

* Update ui module

* Update ui module

Co-authored-by: DefTruth <31974251+DefTruth@users.noreply.github.com>

examples/vision/ocr/PP-OCRv3/android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Sat Oct 08 17:24:34 CST 2022
+distributionBase=GRADLE_USER_HOME
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.3-bin.zip
+distributionPath=wrapper/dists
+zipStorePath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME