Fix SDK license compliance

Renamed `LICENSE` file to `LICENSE.txt` to fix link in old maven releases that have hardcoded link to license in POM file.

Added license file in the src/main/assets directory. By adding it there it will be included in the AAR’s assets folder. While placing the license at the root of the AAR might have made it more visible, this approach still ensures that the license is packaged with the library, easily accessible to consumers, and compliant with licensing requirements—all without the need for post-processing the AAR through custom Gradle scripts.

The main minus of this solution is that now there are two copies of license file in the same project making it easy to miss in later changes.

MOB-3835

LICENSE → LICENSE.txt

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2022 Glia Technologies, Inc.
+Copyright (c) 2025 Glia Technologies, Inc.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

widgetssdk/src/main/assets/LICENSE.txt

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Glia Technologies, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.