Fix buffer producer being blocked when dequeing buffers.

This cl fixes 2 problems:
 * Despite being documented otherwise, GLConsumer::updateTexImage
   doesn't actually acquire most recently queued buffer, but next
   buffer. This cl modifies EglSurfaceTexture::updateTexture to
   call GLConsumer::updateTexImage repeatedly to actually get
   to most recent buffer.
 * By default the buffer producer allows to dequeue only 1 buffer,
   this cl modifies the limit to maximum of 64, allowing to utilize
   maximal size of buffer queue.

Bug: 349794105
Test: manually with glasses core and benchmarking app
Test: atest virtual_camera_tests CtsVirtualDevicesCameraTestCases CtsVirtualDevicesCameraCtsTestCases
Flag: EXEMPT bugfix
Change-Id: I85c1cba682ea29d5b0ad51ea258a76e2cab06f5f