Fix debug bundle temp file creation on Android

Use app-provided cache directory for os.CreateTemp instead of
os.TempDir() which resolves to /data/local/tmp/ on Android — a
directory not writable by regular apps.

Thread TempDir through GeneratorDependencies -> BundleGenerator and
MobileDependency -> EngineConfig so the Android client can pass its
cache directory from PlatformFiles.CacheDir().

client/internal/engine.go

@@ -140,6 +140,7 @@ type EngineConfig struct {
 	ProfileConfig *profilemanager.Config
 
 	LogPath string
+	TempDir string
 }
 
 // EngineServices holds the external service dependencies required by the Engine.
@@ -1095,6 +1096,7 @@ func (e *Engine) handleBundle(params *mgmProto.BundleParameters) (*mgmProto.JobR
 		StatusRecorder: e.statusRecorder,
 		SyncResponse:   syncResponse,
 		LogPath:        e.config.LogPath,
+		TempDir:        e.config.TempDir,
 		ClientMetrics:  e.clientMetrics,
 		RefreshStatus: func() {
 			e.RunHealthProbes(true)