CLOCK_BOOTTIME does not work for gettimestamp

Android version(s): 10
Android device(s): Pixel 3 XL
Oboe version: 1.6.1
App name used for testing:
(Please try to reproduce the issue using the OboeTester or an Oboe sample.)
LiveEffect
**Short description**
(Please only report one bug per Issue. Do not combine multiple bugs.)
**Steps to reproduce**
Try stream->getTimestamp(CLOCK_MONOTONIC) and stream->getTimestamp(CLOCK_BOOTTIME) in LiveEffect.
**Expected behavior**
They should output different timestamps for the same frame position.
**Actual behavior**
They output the same timestamps whose clock source is the same as System.nanotime().
**Device**

**Any additional context**

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