umi: Add device spec info about Xiaomi Mi 10

Change-Id: I1c142c49258c8d4fb4e8f588d8e0a767e789c589

Author: chaptsand

README.md

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+Copyright (C) 2022 - The LineageOS Project
+
+Device configuration for Xiaomi Mi 10
+=========================================
+
+The Xiaomi Mi 10 (codenamed _"umi"_) is a flagship smartphone from Xiaomi.
+
+It was announced on February 2020. Release date was February 2020.
+
+## Device specifications
+
+| Basic                   | Spec Sheet                                                                     |
+| ----------------------: | :----------------------------------------------------------------------------- |
+| SoC                     | Qualcomm SM8250 Snapdragon 865                                                 |
+| CPU                     | 1x 2.84GHz Kryo™ 585 + 3x 2.42GHz Kryo™ 585 + 4x 1.80Ghz Kryo™ 585             |
+| GPU                     | Adreno 650                                                                     |
+| Memory                  | 8 / 12 GB RAM                                                                  |
+| Shipped Android Version | 10.0 with MIUI 11                                                              |
+| Storage                 | 128 / 256 GB                                                                   |
+| Battery                 | Non-removable Li-Po 4780 mAh                                                   |
+| Display                 | 2340 x 1080 pixels, 6.67 inches, 90Hz refresh rate, AMOLED HDR10+              |
+| Rear Camera             | 108MP(Primary sensor) 13MP(Ultra wide-angle) 2MP(Depth sensor) 2MP(Macro lens) |
+| Front Camera            | 20MP                                                                           |
+
+![Xiaomi MI 10](https://i01.appmifile.com/webfile/globalimg/products/pc/mi10/specs1.png)