[Simulator/Android] Bump to latest dependencies + other improvements

[mickbot-92]

• Bumping to latest stable dependencies and Gradle.
  • [CI] Building with JDK 21 instead of with JDK 11 (JDK 17 works fine too if you remove the latest line of build.gradle).
  • Using mavenCentral() instead of deprecated jcenter()
• Removing useless Google plugins.
• Setting compileSdk to 33 : Upsilon no longer requires the Notification permission.
• versionCode : compiling with the current Unix/Epoch timestamp.
• versionName : using the UPSILON_VERSION variable instead of the Omega one + adding the date of compiling.
• Some improvements about icons.
• [CI] Using the latests uses: to make the warning about NodeJS deprecation disappear.

Many thanks to @Yaya-Cout (and to @pi-dev500 too :) 🫡

[github-actions[bot]]

.text	.rodata	.bss	.data	Total (RAM)	Total (ROM)
Base	822476 bytes	478317 bytes	226520 bytes	1820 bytes	228340 bytes	1302613 bytes
Head	822476 bytes	478317 bytes	226520 bytes	1820 bytes	228340 bytes	1302613 bytes
+0 bytes	+0 bytes	+0 bytes	+0 bytes	+0 bytes	+0 bytes
+0.0 %	+0.0 %	+0.0 %	+0.0 %	+0.0 %	+0.0 %