Fix potential buffer overflow issue

[Nailik]

I found this issue while implementing a small resampler based on this project.

Description
AudioRendererand AudioOverlayFilteruse:

val estimatedTargetSampleCount = ceil(sourceSampleCount * samplingRatio).toInt()
 val targetBufferCapacity = estimatedTargetSampleCount * channelCount * BYTES_PER_SAMPLE

to calculate the size of the target buffer.
In case this estimation is too small (happens on big differences in samplerate) this results in 2 issues.

Issue
processAudioFrame in audio-processor.cpp doesn't know about the size, resulting in memory access vialoation.

Fix
Drop audio when target buffer capacity is reached.

Issue
targetFrame.buffer.limit(targetBufferSize) throws an IllegalArgumentException.

Fix
Take min min(targetBufferSize, targetFrame.buffer.capacity())

[izzytwosheds]

Nice fix. Thank you!

[Nailik]

@izzytwosheds i fixed a small issue you could review again.