Merge pull request #14011 from komakai:debug-build

* Add Android SDK debug build flag

* Change LOG_TAG define for consistency with other modules

modules/dnn/misc/java/src/cpp/dnn_converters.cpp

@@ -6,6 +6,7 @@
 
 #include "dnn_converters.hpp"
 
+#define LOG_TAG "org.opencv.dnn"
 
 void Mat_to_MatShape(cv::Mat& mat, MatShape& matshape)
 {

modules/java/android_sdk/android_gradle_lib/build.gradle

@@ -10,6 +10,11 @@ android {
     }
 
     buildTypes {
+        debug {
+            packagingOptions{
+                doNotStrip '*.so'
+            }
+        }
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'