Add coverage for MSTG-CODE-9 on Android

[cpholguera]

The Android test "Make Sure That Free Security Features Are Activated (MSTG-CODE-9)" was wrongly covering obfuscation. Now it's corrected and covers binary anti-exploitation protections.

Overview of all changes:

• Document/0x04c-Tampering-and-Reverse-Engineering.md: add general section about "Obfuscation" (most of the content took from Document/0x06j-Testing-Resiliency-Against-Reverse-Engineering.md). Now linked from:
  • Document/0x05j-Testing-Resiliency-Against-Reverse-Engineering.md
  • Document/0x06j-Testing-Resiliency-Against-Reverse-Engineering.md
• Document/0x04h-Testing-Code-Quality.md: add general section about "Binary Protection Mechanisms". Now linked from:
  • Document/0x05i-Testing-Code-Quality-and-Build-Settings.md
  • Document/0x06i-Testing-Code-Quality-and-Build-Settings.md
• Document/0x05a-Platform-Overview.md: add image about java2oat compilation.
• Document/0x05b-Basic-Security_Testing.md: add info about the Android Compiled App Binary (.odex).
• Document/0x05c-Reverse-Engineering-and-Tampering.md: distinguish between Java Disassembled Code (Smali) and Java Decompiled Code.
• Document/0x05i-Testing-Code-Quality-and-Build-Settings.md: new Android MSTG-CODE-9 test content.
• Document/0x05j-Testing-Resiliency-Against-Reverse-Engineering.md: integrated "android obfuscation content" originally in the Android test "Make Sure That Free Security Features Are Activated (MSTG-CODE-9)"
• Document/0x06b-Basic-Security-Testing.md: improved content about iOS native libraries.
• Document/0x06i-Testing-Code-Quality-and-Build-Settings.md: improved iOS MSTG-CODE-9 test case "Make Sure That Free Security Features Are Activated (MSTG-CODE-9)" and made it consistent with the Android counterpart.
• Document/0x06j-Testing-Resiliency-Against-Reverse-Engineering.md: moved "Obfuscation" content to the general chapter and linked back to it.
• Document/0x08-Testing-Tools.md: added APKiD tool entry.

[TheDauntless]

Not a real review yet, because I think the approach should maybe be a bit different. By focussing only on native files, the test would become a lot clearer.

[TheDauntless]

Most of them are easy fixes :)

[TheDauntless]

🥳