Compile BundledSQLiteDriver's JNI for Windows

Adds MINGW_X64 as a compilation target for sqlite-bundled. Fixes androidx Gradle logic to find Windows's JNI and refactor the location of the native artifacts to the '/natives/<platform>' folder in the jar (instead of top-level platform folders). Finally, fix a bit NativeLibraryLoader to support Window's '.dll' files.

Bug: 335521661
Test: Validated sqlite-bundled usage in sample JVM app in a Windows host.
Change-Id: I03c10d3437b5d16bcb42520b9f5d0f3807718b23
diff --git a/sqlite/sqlite-bundled/build.gradle b/sqlite/sqlite-bundled/build.gradle
index 8df8903..1f3d1d3 100644
--- a/sqlite/sqlite-bundled/build.gradle
+++ b/sqlite/sqlite-bundled/build.gradle
@@ -106,6 +106,7 @@
             KonanTarget.ANDROID_X86,
             KonanTarget.MACOS_ARM64,
             KonanTarget.MACOS_X64,
+            KonanTarget.MINGW_X64,
             KonanTarget.LINUX_X64,
     ].collect { it.INSTANCE } // Use INSTANCE to get object class instance from kotlin
 
@@ -144,7 +145,7 @@
     )
 
     // Define C++ compilation of JNI
-    def jvmArtJniImplementation = createNativeCompilation("jvmArtJniImplementation") {
+    def jvmArtJniImplementation = createNativeCompilation("sqliteJni") {
         configureEachTarget { nativeCompilation ->
             // add JNI headers as sources
             nativeCompilation.addJniHeaders()