Update LatinIME to comply with Android's inclusive language guidance

See https://source.android.com/setup/contribute/respectful-code for reference

Bug: 162536543
Change-Id: I5df9e60ec6caa2e1e3253532c2b59b74adfc1749

dictionaries/sample.combined

@@ -14,7 +14,7 @@
 # should not be considered a typo, but that should never be suggested
 # explicitly. An entry may be made not a word by adding a `not_a_word'
 # field with a value of `true'. The main reason for putting such entries
-# into the dictionary is to add shortcut targets and maybe a whitelist
+# into the dictionary is to add shortcut targets and maybe an allowlist
 # replacement.
 #
 # Each word may or may not have any number of shortcut target lines

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

@@ -222,7 +222,7 @@ public class RichInputMethodSubtype {
             return noLanguageSubtype;
         }
         Log.w(TAG, "Can't find any language with QWERTY subtype");
-        Log.w(TAG, "No input method subtype found; returning dummy subtype: "
+        Log.w(TAG, "No input method subtype found; returning placeholder subtype: "
                 + PLACEHOLDER_NO_LANGUAGE_SUBTYPE);
         return PLACEHOLDER_NO_LANGUAGE_SUBTYPE;
     }
@@ -243,7 +243,7 @@ public class RichInputMethodSubtype {
             return emojiSubtype;
         }
         Log.w(TAG, "Can't find emoji subtype");
-        Log.w(TAG, "No input method subtype found; returning dummy subtype: "
+        Log.w(TAG, "No input method subtype found; returning placeholder subtype: "
                 + PLACEHOLDER_EMOJI_SUBTYPE);
         return PLACEHOLDER_EMOJI_SUBTYPE;
     }