Any unescaped quotes will become escaped with the exception of double quotes that surround an entire string. Be aware that
<string>'"'</string>
will become
<string>\'\"\'</string>.
The correct way to have a string composed of one double quote is
<string>\"</string>.
For the same reasons,
<string>\"x\"</string>
will become
<string>"x"</string>.
The correct way to have a string show up in Android surrounded by quotes is:
<string>"\"x\""</string>.