Test live location permission preservation

Split the existing PR change into a smaller reviewable piece.
Original change: fix: do not revoke live location when enabling it

app/src/test/java/com/bitchat/android/geohash/LiveLocationPrivacyGateTest.kt

@@ -0,0 +1,32 @@
+package com.bitchat.android.geohash
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class LiveLocationPrivacyGateTest {
+    @Test
+    fun `enabling location does not fire revocation listeners`() {
+        var revoked = 0
+        val listener = { revoked += 1 }
+        LiveLocationPrivacyGate.addRevocationListener(listener)
+        try {
+            LiveLocationPrivacyGate.update(false)
+            val afterDisable = revoked
+            assertTrue("disable should revoke", afterDisable >= 1)
+
+            LiveLocationPrivacyGate.update(true)
+            assertEquals(
+                "enable must not cancel in-flight location work",
+                afterDisable,
+                revoked
+            )
+
+            LiveLocationPrivacyGate.update(false)
+            assertTrue(revoked > afterDisable)
+        } finally {
+            LiveLocationPrivacyGate.removeRevocationListener(listener)
+            LiveLocationPrivacyGate.update(false)
+        }
+    }
+}