Replace UTF-8 string resources with their hex representations

bug: 5988656
Change-Id: Ifc3c3a2eccfc23d75b4066c2c9c02c48dacda55b
diff --git a/java/res/xml-sw768dp/rows_bulgarian.xml b/java/res/xml-sw768dp/rows_bulgarian.xml
index d67a0d1..844744e 100644
--- a/java/res/xml-sw768dp/rows_bulgarian.xml
+++ b/java/res/xml-sw768dp/rows_bulgarian.xml
@@ -29,29 +29,40 @@
         <Key
             latin:keyStyle="tabKeyStyle"
             latin:keyLabelFlags="alignLeft" />
+        <!-- \u0447: "ч" CYRILLIC SMALL LETTER CHE -->
         <Key
-            latin:keyLabel="ч" />
+            latin:keyLabel="\u0447" />
+        <!-- \u0448: "ш" CYRILLIC SMALL LETTER SHA -->
         <Key
-            latin:keyLabel="ш" />
+            latin:keyLabel="\u0448" />
+        <!-- \u0435: "е" CYRILLIC SMALL LETTER IE -->
         <Key
-            latin:keyLabel="е" />
+            latin:keyLabel="\u0435" />
+        <!-- \u0440: "р" CYRILLIC SMALL LETTER ER -->
         <Key
-            latin:keyLabel="р" />
+            latin:keyLabel="\u0440" />
+        <!-- \u0442: "т" CYRILLIC SMALL LETTER TE -->
         <Key
-            latin:keyLabel="т" />
+            latin:keyLabel="\u0442" />
+        <!-- \u044a: "ъ" CYRILLIC SMALL LETTER HARD SIGN -->
         <Key
-            latin:keyLabel="ъ" />
+            latin:keyLabel="\u044a" />
+        <!-- \u0443: "у" CYRILLIC SMALL LETTER U -->
         <Key
-            latin:keyLabel="у" />
+            latin:keyLabel="\u0443" />
+        <!-- \u0438: "и" CYRILLIC SMALL LETTER I -->
         <Key
-            latin:keyLabel="и"
+            latin:keyLabel="\u0438"
             latin:moreKeys="ѝ" />
+        <!-- \u043e: "о" CYRILLIC SMALL LETTER O -->
         <Key
-            latin:keyLabel="о" />
+            latin:keyLabel="\u043e" />
+        <!-- \u043f: "п" CYRILLIC SMALL LETTER PE -->
         <Key
-            latin:keyLabel="п" />
+            latin:keyLabel="\u043f" />
+        <!-- \u044f: "я" CYRILLIC SMALL LETTER YA -->
         <Key
-            latin:keyLabel="я" />
+            latin:keyLabel="\u044f" />
         <Key
             latin:keyStyle="deleteKeyStyle"
             latin:keyWidth="fillBoth" />
@@ -63,28 +74,39 @@
             latin:keyStyle="toSymbolKeyStyle"
             latin:keyLabelFlags="alignLeft"
             latin:keyWidth="9.375%p" />
+        <!-- \u0430: "а" CYRILLIC SMALL LETTER A -->
         <Key
-            latin:keyLabel="а" />
+            latin:keyLabel="\u0430" />
+        <!-- \u0441: "с" CYRILLIC SMALL LETTER ES -->
         <Key
-            latin:keyLabel="с" />
+            latin:keyLabel="\u0441" />
+        <!-- \u0434: "д" CYRILLIC SMALL LETTER DE -->
         <Key
-            latin:keyLabel="д" />
+            latin:keyLabel="\u0434" />
+        <!-- \u0444: "ф" CYRILLIC SMALL LETTER EF -->
         <Key
-            latin:keyLabel="ф" />
+            latin:keyLabel="\u0444" />
+        <!-- \u0433: "г" CYRILLIC SMALL LETTER GHE -->
         <Key
-            latin:keyLabel="г" />
+            latin:keyLabel="\u0433" />
+        <!-- \u0445: "х" CYRILLIC SMALL LETTER HA -->
         <Key
-            latin:keyLabel="х" />
+            latin:keyLabel="\u0445" />
+        <!-- \u0439: "й" CYRILLIC SMALL LETTER SHORT I -->
         <Key
-            latin:keyLabel="й" />
+            latin:keyLabel="\u0439" />
+        <!-- \u043a: "к" CYRILLIC SMALL LETTER KA -->
         <Key
-            latin:keyLabel="к" />
+            latin:keyLabel="\u043a" />
+        <!-- \u043b: "л" CYRILLIC SMALL LETTER EL -->
         <Key
-            latin:keyLabel="л" />
+            latin:keyLabel="\u043b" />
+        <!-- \u0449: "щ" CYRILLIC SMALL LETTER SHCHA -->
         <Key
-            latin:keyLabel="щ" />
+            latin:keyLabel="\u0449" />
+        <!-- \u044c: "ь" CYRILLIC SMALL LETTER SOFT SIGN -->
         <Key
-            latin:keyLabel="ь" />
+            latin:keyLabel="\u044c" />
         <Key
             latin:keyStyle="enterKeyStyle"
             latin:keyWidth="fillBoth" />
@@ -95,22 +117,30 @@
         <Key
             latin:keyStyle="shiftKeyStyle"
             latin:keyWidth="14.375%p" />
+        <!-- \u0437: "з" CYRILLIC SMALL LETTER ZE -->
         <Key
-            latin:keyLabel="з" />
+            latin:keyLabel="\u0437" />
+        <!-- \u0436: "ж" CYRILLIC SMALL LETTER ZHE -->
         <Key
-            latin:keyLabel="ж" />
+            latin:keyLabel="\u0436" />
+        <!-- \u0446: "ц" CYRILLIC SMALL LETTER TSE -->
         <Key
-            latin:keyLabel="ц" />
+            latin:keyLabel="\u0446" />
+        <!-- \u0432: "в" CYRILLIC SMALL LETTER VE -->
         <Key
-            latin:keyLabel="в" />
+            latin:keyLabel="\u0432" />
+        <!-- \u0431: "б" CYRILLIC SMALL LETTER BE -->
         <Key
-            latin:keyLabel="б" />
+            latin:keyLabel="\u0431" />
+        <!-- \u043d: "н" CYRILLIC SMALL LETTER EN -->
         <Key
-            latin:keyLabel="н" />
+            latin:keyLabel="\u043d" />
+        <!-- \u043c: "м" CYRILLIC SMALL LETTER EM -->
         <Key
-            latin:keyLabel="м" />
+            latin:keyLabel="\u043c" />
+        <!-- \u044e: "ю" CYRILLIC SMALL LETTER YU -->
         <Key
-            latin:keyLabel="ю" />
+            latin:keyLabel="\u044e" />
         <include
             latin:keyboardLayout="@xml/keys_comma_period" />
         <Key