fix(download): preserve SAF and defer background starts

android/app/src/test/kotlin/com/zarz/spotiflac/ForegroundServiceStartPolicyTest.kt

@@ -0,0 +1,29 @@
+package com.zarz.spotiflac
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class ForegroundServiceStartPolicyTest {
+    @Test
+    fun mapsAndroidForegroundStartDenialsToStableCode() {
+        val error = IllegalStateException(
+            "startForegroundService() not allowed due to mAllowStartForeground false",
+        )
+
+        assertTrue(ForegroundServiceStartPolicy.isStartNotAllowed(error))
+        assertEquals(
+            ForegroundServiceStartPolicy.START_NOT_ALLOWED_CODE,
+            ForegroundServiceStartPolicy.errorCode(error),
+        )
+    }
+
+    @Test
+    fun leavesUnrelatedPlatformFailuresGeneric() {
+        val error = IllegalStateException("network unavailable")
+
+        assertFalse(ForegroundServiceStartPolicy.isStartNotAllowed(error))
+        assertEquals("ERROR", ForegroundServiceStartPolicy.errorCode(error))
+    }
+}