Reland "Move JavaInputStreamAdaptor into third_party and add a LICENSE file."

This is a reland of eac2d518bd5f242597d91d81eb60b020ae35dae4

The aosp folder was added to the google3 roller include_patterns list:
http://cl/315274044

Original change's description:
> Move JavaInputStreamAdaptor into third_party and add a LICENSE file.
>
> Change-Id: I723b15fbcf3343559fb5a3fe3015cf3db96e2841
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/294696
> Reviewed-by: Heather Miller <hcm@google.com>
> Commit-Queue: John Stiles <johnstiles@google.com>

Change-Id: I27ac16c3ac05fbee1473af886379e95492302d50
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/295000
Reviewed-by: Heather Miller <hcm@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index 7525613..e765a12 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -2107,8 +2107,8 @@
       is_shared_library = true
 
       sources = [
-        "platform_tools/android/apps/skottie/src/main/cpp/JavaInputStreamAdaptor.cpp",
         "platform_tools/android/apps/skottie/src/main/cpp/native-lib.cpp",
+        "third_party/aosp/JavaInputStreamAdaptor.cpp",
       ]
       libs = []
 
diff --git a/infra/bots/compile.isolate b/infra/bots/compile.isolate
index 83fb445..09fd5ad 100644
--- a/infra/bots/compile.isolate
+++ b/infra/bots/compile.isolate
@@ -42,7 +42,7 @@
       '../../include',
       '../../modules',
       '../../platform_tools/android/apps/arcore/src/main/cpp',
-      '../../platform_tools/android/apps/skottie/src/main/cpp',
+      '../../platform_tools/android/apps/skottie/src/main/cpp/native-lib.cpp',
       '../../platform_tools/android/launcher/skia_launcher.cpp',
       '../../platform_tools/android/vulkan/Skia_Vulkan_Android.h',
       '../../platform_tools/ios/app/LaunchScreen.storyboard',
diff --git a/platform_tools/android/apps/skottie/src/main/cpp/native-lib.cpp b/platform_tools/android/apps/skottie/src/main/cpp/native-lib.cpp
index 5dd7f61..08814d4 100644
--- a/platform_tools/android/apps/skottie/src/main/cpp/native-lib.cpp
+++ b/platform_tools/android/apps/skottie/src/main/cpp/native-lib.cpp
@@ -29,7 +29,7 @@
 
 #include <GLES3/gl3.h>
 #include <android/trace.h>
-#include "platform_tools/android/apps/skottie/src/main/cpp/JavaInputStreamAdaptor.h"
+#include "third_party/aosp/JavaInputStreamAdaptor.h"
 
 #define STENCIL_BUFFER_SIZE 8
 
diff --git a/platform_tools/android/apps/skottie/src/main/cpp/JavaInputStreamAdaptor.cpp b/third_party/aosp/JavaInputStreamAdaptor.cpp
similarity index 98%
rename from platform_tools/android/apps/skottie/src/main/cpp/JavaInputStreamAdaptor.cpp
rename to third_party/aosp/JavaInputStreamAdaptor.cpp
index caeb859..cbb298f 100644
--- a/platform_tools/android/apps/skottie/src/main/cpp/JavaInputStreamAdaptor.cpp
+++ b/third_party/aosp/JavaInputStreamAdaptor.cpp
@@ -16,7 +16,7 @@
 
 
 #include "include/core/SkTypes.h"
-#include "platform_tools/android/apps/skottie/src/main/cpp/JavaInputStreamAdaptor.h"
+#include "third_party/aosp/JavaInputStreamAdaptor.h"
 
 static jclass findClassCheck(JNIEnv* env, const char classname[]) {
     jclass clazz = env->FindClass(classname);
diff --git a/platform_tools/android/apps/skottie/src/main/cpp/JavaInputStreamAdaptor.h b/third_party/aosp/JavaInputStreamAdaptor.h
similarity index 100%
rename from platform_tools/android/apps/skottie/src/main/cpp/JavaInputStreamAdaptor.h
rename to third_party/aosp/JavaInputStreamAdaptor.h
diff --git a/third_party/aosp/LICENSE b/third_party/aosp/LICENSE
new file mode 100644
index 0000000..64635a4
--- /dev/null
+++ b/third_party/aosp/LICENSE
@@ -0,0 +1,161 @@
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