hex_util: Fix incorrect array size in AsArray

Although this isn't used, this is a potential bug as HexStringToArray will perform an out-of-bounds read.

src/common/hex_util.h

@@ -61,7 +61,7 @@ template <typename ContiguousContainer>
     return out;
 }
 
-[[nodiscard]] constexpr std::array<u8, 16> AsArray(const char (&data)[17]) {
+[[nodiscard]] constexpr std::array<u8, 16> AsArray(const char (&data)[33]) {
     return HexStringToArray<16>(data);
 }
 

src/core/hle/service/am/applets/applet_software_keyboard.cpp

@@ -377,8 +377,7 @@ void SoftwareKeyboard::SubmitForTextCheck(std::u16string submitted_text) {
 
     if (swkbd_config_common.use_utf8) {
         std::string utf8_submitted_text = Common::UTF16ToUTF8(current_text);
-        // Include the null terminator in the buffer size.
-        const u64 buffer_size = utf8_submitted_text.size() + 1;
+        const u64 buffer_size = utf8_submitted_text.size();
 
         LOG_DEBUG(Service_AM, "\nBuffer Size: {}\nUTF-8 Submitted Text: {}", buffer_size,
                   utf8_submitted_text);
@@ -387,8 +386,7 @@ void SoftwareKeyboard::SubmitForTextCheck(std::u16string submitted_text) {
         std::memcpy(out_data.data() + sizeof(u64), utf8_submitted_text.data(),
                     utf8_submitted_text.size());
     } else {
-        // Include the null terminator in the buffer size.
-        const u64 buffer_size = (current_text.size() + 1) * sizeof(char16_t);
+        const u64 buffer_size = current_text.size() * sizeof(char16_t);
 
         LOG_DEBUG(Service_AM, "\nBuffer Size: {}\nUTF-16 Submitted Text: {}", buffer_size,
                   Common::UTF16ToUTF8(current_text));