Fix Android adaptive launcher icon (pingdotgg#4332)

Co-authored-by: Yash Singh <saiansh2525@gmail.com>

Author: colonelpanic8

apps/mobile/app.config.ts

@@ -15,6 +15,9 @@ const personalTeamBundleIdentifier = repoEnv.T3CODE_IOS_PERSONAL_TEAM_BUNDLE_ID?
 const IOS_BUNDLE_IDENTIFIER_PATTERN = /^[A-Za-z0-9-]+(?:\.[A-Za-z0-9-]+)+$/;
 
 const fromRepoRoot = (relativePath: string) => `../../${relativePath}`;
+// Universal exports already contain their own rounded-square silhouette. Using one as an adaptive
+// foreground makes Android draw an icon shape inside the launcher's mask.
+const androidAdaptiveForeground = "./assets/android-icon-foreground.png";
 
 if (
   isIosPersonalTeamBuild &&
@@ -30,7 +33,7 @@ const DEVELOPMENT_ASSETS = {
   appIcon: fromRepoRoot(BRAND_ASSET_PATHS.developmentIosIconPng),
   iosIcon: fromRepoRoot(BRAND_ASSET_PATHS.developmentIconComposerProject),
   splashIcon: fromRepoRoot(BRAND_ASSET_PATHS.developmentIosIconPng),
-  androidAdaptiveForeground: fromRepoRoot(BRAND_ASSET_PATHS.developmentUniversalIconPng),
+  androidAdaptiveForeground,
   androidAdaptiveBackgroundColor: "#00639B",
   androidMonochromeIcon: "./assets/android-icon-mark.png",
   androidNotificationIcon: "./assets/android-notification-icon.png",
@@ -41,7 +44,7 @@ const PREVIEW_ASSETS = {
   appIcon: fromRepoRoot(BRAND_ASSET_PATHS.nightlyIosIconPng),
   iosIcon: fromRepoRoot(BRAND_ASSET_PATHS.nightlyIconComposerProject),
   splashIcon: fromRepoRoot(BRAND_ASSET_PATHS.nightlyIosIconPng),
-  androidAdaptiveForeground: fromRepoRoot(BRAND_ASSET_PATHS.nightlyLinuxIconPng),
+  androidAdaptiveForeground,
   androidAdaptiveBackgroundColor: "#111533",
   androidMonochromeIcon: "./assets/android-icon-mark.png",
   androidNotificationIcon: "./assets/android-notification-icon.png",
@@ -52,7 +55,7 @@ const RELEASE_ASSETS = {
   appIcon: fromRepoRoot(BRAND_ASSET_PATHS.productionIosIconPng),
   iosIcon: fromRepoRoot(BRAND_ASSET_PATHS.productionIconComposerProject),
   splashIcon: fromRepoRoot(BRAND_ASSET_PATHS.productionIosIconPng),
-  androidAdaptiveForeground: "./assets/android-icon-mark.png",
+  androidAdaptiveForeground,
   androidAdaptiveBackgroundColor: "#000000",
   androidMonochromeIcon: "./assets/android-icon-mark.png",
   androidNotificationIcon: "./assets/android-notification-icon.png",

apps/mobile/assets/android-icon-foreground.png

@@ -48,3 +48,17 @@ Verify every result is 1024×1024 and has the classic macOS safe area: an 824×8
 ```
 
 Do not edit the generated PNG or ICO files directly.
+
+## Android adaptive foreground
+
+`apps/mobile/assets/android-icon-foreground.svg` is the source of truth for the foreground used by
+the normal Android adaptive launcher icon. Export its paired PNG after changing it:
+
+```sh
+rsvg-convert -w 432 -h 432 \
+  -o apps/mobile/assets/android-icon-foreground.png \
+  apps/mobile/assets/android-icon-foreground.svg
+```
+
+The foreground must remain transparent and keep the T3 mark inside Android's adaptive-icon safe
+zone. `android-icon-mark.png` remains a flat silhouette for Android's monochrome themed icon.