Move dead submodules in-tree

Signed-off-by: swurl <swurl@swurl.xyz>

externals/oboe/samples/LiveEffect/README.md

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+LiveEffect Sample
+============
+
+This sample simply loops audio from input stream to output stream to demonstrate
+the usage of the 2 stream interfaces.
+
+Screenshots
+-----------
+
+![Screenshot](screenshot.png)
+
+
+### Stream Configurations
+- 48kHz
+- oboe::I16
+- stereo or mono
+
+### Customizing the App
+
+If you want to customize the effects processing then modify the
+onBothStreamsReady() method in "src/main/cpp/FullDuplexPass.h"
+
+### Caveats
+OpenES SL does not allow setting the recording or playback device.
+
+Synchronizing input and output streams for full-duplex operation is tricky.  
+
+Input and output have different startup times. The input side may have to charge up the microphone circuit.
+Also the initial timing for the output callback may be bursty as it fills the buffer up.
+So when the output stream makes its first callback, the input buffer may be overflowing or empty or partially full.
+
+In order to get into sync we go through a few phases.
+
+* In Phase 1 we always drain the input buffer as much as possible, more than the output callback asks for. When we have done this for a while, we move to phase 2.
+* In Phase 2 we optionally skip reading the input once to allow it to fill up with one burst. This makes it less likely to underflow on future reads.
+* In Phase 3 we should be in a stable situation where the output is nearly full and the input is nearly empty.  You should be able to run for hours like this with no glitches.