Rename CtsAndroidTestBase29ApiSignatureTestCases in TEST MAPPING file.

Reason: CtsAndroidTestBase28ApiSignatureTestCases has been renamed to
CtsAndroidTestBase29ApiSignatureTestCases, so correct this.

Bug: 233937435

Test: unittest
Change-Id: I3b1be4ce4033104fcb86027fe596c852d64e6fa1
1 file changed