Fixed View.getContentCaptureSession(ContentCaptureManager).

This method was meant to optimize the ContentCaptureManager lookup, but it was not recursively
callign itself....

With this change and using System.out / System.nanotime() to measure:

$ adb shell am start android.contentcaptureservice.cts/.BlankWithTitleActivity

16 calls, taking 260.051us before and 30.311us after

$ adb shell am start android.contentcaptureservice.cts/.LoginActivity

24 calls, taking 290.261us before and 41.403us after

Bug: 123307965
Bug: 121039624
Test: atest ContentCaptureSession
Test: manual verification using system.out for timing
Change-Id: Ida5015ed117cae8ab4484a55f74cbc20fdc6df7f