fix(e2e): use mobile-devtools branch with hash override fix

Updated both E2E examples to reference the feat/move-flake-to-devbox-d
branch of mobile-devtools, which includes:

1. **Hash override implementation in flake.nix**: Applies hash overrides
   via Nix overlay to fix platform-tools fetch on macOS
2. **Platform-tools r37.0.0 darwin hash**: Plugin-level hash override

This fixes Android SDK build failures on macOS that were preventing
local development and doctor command from working.

Changes:
- examples/E2E-compat/devbox.json: Add branch ref to plugin include
- examples/E2E-latest/devbox.json: Add branch ref to plugin include

Note: Once mobile-devtools PR is merged, remove the branch ref to use default.

Related: segment-integrations/mobile-devtools@b7ffde6

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: abueide

examples/E2E-compat/devbox.json

@@ -1,6 +1,6 @@
 {
   "include": [
-    "github:segment-integrations/mobile-devtools?dir=plugins/react-native"
+    "github:segment-integrations/mobile-devtools/feat/move-flake-to-devbox-d?dir=plugins/react-native"
   ],
   "packages": [
     "nodejs@20",

examples/E2E-latest/devbox.json

@@ -1,6 +1,6 @@
 {
   "include": [
-    "github:segment-integrations/mobile-devtools?dir=plugins/react-native"
+    "github:segment-integrations/mobile-devtools/feat/move-flake-to-devbox-d?dir=plugins/react-native"
   ],
   "packages": [
     "nodejs@20",