Camera: Heic: Handle out-of-order buffer outputs

During reprocess usecases, the Camera HAL may return JPEG Appsegment
frames out of order. This leads to a scenario where
mAppSegmentConsumer->lockNextBuffer may not refer to the currently muxed
frame.

To work around this, the number of lockable appsegment buffers has been
increased.

Test: Vendor testing
Bug: 141169323
Change-Id: Ia498f6ddaba588b66cbaeee94fe8bdd7314bb90c