Keep existing Pattern.splitAsStream API behavior on Android 13 or below

Bug: 288845345
Test: atest CtsLibcoreOjTestCases:test.java.util.regex
(cherry picked from https://android-review.googlesource.com/q/commit:2fde36440580f1b1ed36b3ee2b18b0f2fa065b3f)
Merged-In: Ib317c38d5664e25286a4733979b29bb2a40e40d3
Change-Id: Ib317c38d5664e25286a4733979b29bb2a40e40d3
3 files changed