feat(android): a padlock icon instead of Delphi's default

Cyan on slate, the accent the desktop app already uses. Adaptive vectors for
Android 8+ - background covering the full 108 units since the launcher applies
its own mask, foreground kept inside the central 66 that no mask can crop -
plus a monochrome layer for Android 13 themed icons, where the keyhole has to
be a hole in the path rather than a shape in another colour.

PNGs for older launchers come from make-icons.ps1, same drawing, and carry
their own rounded square since nothing masks them.

They are copied over Delphi's in repack-apk.ps1, for the same reason as
libsk4d.so: the Android_LauncherIcon and Android_AdaptiveIcon properties ought
to be enough, and nothing deploys them here.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

android-client/repack-apk.ps1

@@ -21,6 +21,11 @@ $p    = '.\Android64\Debug\pmserverApk'
 # 1. Remettre Skia, que Deploy vient d'effacer.
 Copy-Item "$bds\binandroid64\libsk4d.so" "$p\library\lib\arm64-v8a\libsk4d.so" -Force
 
+# 1 bis. Nos icones par-dessus celles de Delphi. Meme raison que pour Skia :
+# les proprietes Android_LauncherIcon* et Android_AdaptiveIcon* du .dproj
+# devraient suffire, mais rien ne les deploie ici.
+Copy-Item "$PSScriptRoot\android-res\*" "$p\res\" -Recurse -Force
+
 # 2. aapt : reconstruit l'archive non alignee depuis library, classes, res.
 & $pac -u8 --aaptpackage="$sdk\build-tools\33.0.2\Aapt.exe,$p\library,$p\classes,$p\res,$p\assets,$p\AndroidManifest.xml,$sdk\platforms\android-33\android.jar,$p\bin\pmserverApk-unaligned.apk"
 if ($LASTEXITCODE -ne 0) { throw "aapt a echoue" }