Wait longer for Telephony FW and RIL init before test execution

On some devices, the tests fail intermittently due to timing of
Telephony FW and RIL initiatization before executing the tests.
Added some delay before test execution mitigtes this issue.

Bug: 295440528

Change-Id: I13ae63a6eb476da64579f11a80142be2dca23db9
Merged-In: I13ae63a6eb476da64579f11a80142be2dca23db9
Signed-off-by: Rohit <r.kothari@samsung.corp-partner.google.com>

Author: Rohit

tests/tests/telephony/current/src/android/telephony/cts/TelephonyManagerTestOnMockModem.java

@@ -82,6 +82,12 @@ public static void beforeAllTests() throws Exception {
         sMockModemManager = new MockModemManager();
         assertNotNull(sMockModemManager);
         assertTrue(sMockModemManager.connectMockModemService());
+
+        final PackageManager pm = getContext().getPackageManager();
+        if (pm.hasSystemFeature(PackageManager.FEATURE_WATCH)) {
+            //Wait for Telephony FW and RIL initialization are done
+            TimeUnit.SECONDS.sleep(4);
+        }
     }
 
     @AfterClass