Sanitizer: Set useLegacyPackaging to true

[Why]
Property useLegacyPackaging determin whether to use the legacy convention of compressing all .so files in the APK.
If null, .so files will be uncompressed and page-aligned when minSdk >= 23.
Otherwise, it failed with "INSTALL_FAILED_INVALID_APK: Failed to extract native libraries, res=-2" when minSdk >= 23.

[How]
Set useLegacyPackaging to true when miniSdk >=23.
Reference: https://developer.android.com/ndk/guides/asan

sanitizers/app/build.gradle

@@ -10,7 +10,7 @@ android {
 
     defaultConfig {
         applicationId "com.example.sanitizers"
-        minSdk 21
+        minSdk 23
         targetSdk 32
         versionCode 1
         versionName "1.0"
@@ -65,6 +65,11 @@ android {
             version '3.18.1'
         }
     }
+    packagingOptions {
+        jniLibs {
+            useLegacyPackaging true
+        }
+    }
     buildFeatures {
         viewBinding true
     }