Fix Tamil keyboard unit test for tablet device

This is a follow up change of I226e640fe4.

Bug: 9978106
Change-Id: I6b4657a57bc36e01b0b6f8c56c48d31320b90702

tests/src/com/android/inputmethod/keyboard/layout/Tamil.java

@@ -48,11 +48,17 @@ public final class Tamil extends LayoutBase {
         public ExpectedKey[] getOtherCurrencyKeys() {
             return SymbolsShifted.CURRENCIES_OTHER_GENERIC;
         }
+
         @Override
         public ExpectedKey[] getLeftShiftKeys(final boolean isPhone) {
             return EMPTY_KEYS;
         }
 
+        @Override
+        public ExpectedKey[] getRightShiftKeys(final boolean isPhone) {
+            return isPhone ? EMPTY_KEYS : EXCLAMATION_AND_QUESTION_MARKS;
+        }
+
         // U+0BA4: "த" TAMIL LETTER TA
         // U+0BAE/U+0BBF: "மி" TAMIL LETTER MA/TAMIL VOWEL SIGN I
         // U+0BB4/U+0BCD: "ழ்" TAMIL LETTER LLLA/TAMIL SIGN VIRAMA