Add required flag to receivers in LatinIME

Android T allows apps to declare a runtime receiver as not exported
by invoking registerReceiver with a new RECEIVER_NOT_EXPORTED flag;
receivers registered with this flag will only receive broadcasts from
the platform and the app itself. However to ensure developers can
properly protect their receivers, all apps targeting U
and registering a receiver for non-system broadcasts must
specify either the exported or not exported flag when invoking
registerReceiver; if one of these flags is not provided, the
platform will throw a SecurityException. This commit updates
the dictionary receivers with the RECEIVER_NOT_EXPORTED flag since
these are only sent from the local app. The HIDE_SOFT_INPUT
receiver is flagged with the RECEIVER_EXPORTED flag since it
can be sent by any app with the corresponding permission.

Bug: 234659204
Test: Build
Change-Id: I2b9a1360e0eb1c1965c07cc71dca9f11eb153517

Author: mpgroover

java/src/com/android/inputmethod/latin/LatinIME.java

@@ -628,16 +628,31 @@ public void onCreate() {
 
         final IntentFilter newDictFilter = new IntentFilter();
         newDictFilter.addAction(DictionaryPackConstants.NEW_DICTIONARY_INTENT_ACTION);
-        registerReceiver(mDictionaryPackInstallReceiver, newDictFilter);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            registerReceiver(mDictionaryPackInstallReceiver, newDictFilter,
+                    Context.RECEIVER_NOT_EXPORTED);
+        } else {
+            registerReceiver(mDictionaryPackInstallReceiver, newDictFilter);
+        }
 
         final IntentFilter dictDumpFilter = new IntentFilter();
         dictDumpFilter.addAction(DictionaryDumpBroadcastReceiver.DICTIONARY_DUMP_INTENT_ACTION);
-        registerReceiver(mDictionaryDumpBroadcastReceiver, dictDumpFilter);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            registerReceiver(mDictionaryDumpBroadcastReceiver, dictDumpFilter,
+                    Context.RECEIVER_NOT_EXPORTED);
+        } else {
+            registerReceiver(mDictionaryDumpBroadcastReceiver, dictDumpFilter);
+        }
 
         final IntentFilter hideSoftInputFilter = new IntentFilter();
         hideSoftInputFilter.addAction(ACTION_HIDE_SOFT_INPUT);
-        registerReceiver(mHideSoftInputReceiver, hideSoftInputFilter, PERMISSION_HIDE_SOFT_INPUT,
-                null /* scheduler */);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            registerReceiver(mHideSoftInputReceiver, hideSoftInputFilter,
+                    PERMISSION_HIDE_SOFT_INPUT, null /* scheduler */, Context.RECEIVER_EXPORTED);
+        } else {
+            registerReceiver(mHideSoftInputReceiver, hideSoftInputFilter,
+                    PERMISSION_HIDE_SOFT_INPUT, null /* scheduler */);
+        }
 
         StatsUtils.onCreate(mSettings.getCurrent(), mRichImm);
     }