In python the method's signature is
```py
class SBStructuredData:
def GetStringValue(self, dst_len: int) -> str:
```
There is no way from python to get the total data from GetStringValue
regardless of how many times you call GetStringValue.
Update the implementation
```py
def GetStringValue(self, len: int = 0) -> str:
```
Fixes crash when input is None in `SBStructuredData.SetStringValue`
Don't trim the result when called with the `dynamic` property.
(cherry picked from commit 93377d703115b45c3ad8f5f218cb85769d24a1b0)
Ebuka Ezike
81e0360246