fix: xml parser error not well-formed (invalid token)

[Q0]

Fixes files XML strings in res/*/strings.xml

W: <tmp_dir>/decode/res/values-zh-rHK/strings.xml:0: error: xml parser error: not well-formed (invalid token).
W: <tmp_dir>/decode/res/values-zh-rHK/strings.xml: error: file failed to compile.
W: <tmp_dir>/decode/res/values-zh-rTW/strings.xml:0: error: xml parser error: not well-formed (invalid token).
W: <tmp_dir>/decode/res/values-zh-rTW/strings.xml: error: file failed to compile.

fix issue: #105 related: https://github.com/iBotPeaches/Apktool/issues/2872

[umrashrf]

Can confirm, this does work.