Remove remaining deepCopy() usages in TextClassifier

Did a grep to ensure no more deepCopy() in textclassifier folder.

BUG: 129901152

Test: atest cts/tests/tests/view/src/android/view/textclassifier/cts/

Change-Id: Ia1e6f3ad1664a0b57495d94d2cf5aa8945965862
6 files changed