Integrate the active emergency session listener in TelephonyRegistry

Add Telecom shell command: "adb shell telecom set-system-dialer"

Test: PhoneStateListener cts
Bug: 135204580
Merged-In: I5eaada6a671606642a849f0ff6fe964332d80d5f
Change-Id: I5eaada6a671606642a849f0ff6fe964332d80d5f
diff --git a/packages/Shell/AndroidManifest.xml b/packages/Shell/AndroidManifest.xml
index d2e0201..11b0487 100644
--- a/packages/Shell/AndroidManifest.xml
+++ b/packages/Shell/AndroidManifest.xml
@@ -29,6 +29,7 @@
     <uses-permission android:name="android.permission.CALL_PHONE" />
     <uses-permission android:name="android.permission.READ_PHONE_STATE" />
     <uses-permission android:name="android.permission.READ_PRECISE_PHONE_STATE" />
+    <uses-permission android:name="android.permission.READ_ACTIVE_EMERGENCY_SESSION" />
     <uses-permission android:name="android.permission.READ_PRIVILEGED_PHONE_STATE" />
     <uses-permission android:name="android.permission.READ_CONTACTS" />
     <uses-permission android:name="android.permission.WRITE_CONTACTS" />