Fixes license headers for all Android-specific JavaScriptCore and WebCore files not...

Fixes license headers for all Android-specific JavaScriptCore and WebCore files not yet upstreamed to webkit.org.

WebKit requires either a BSD-style or LGPL 2.1 license for all code.
We use a BSD-style 2-clause license for Android-specific files that will be upstreamed to webkit.org.

- For most files, I've fixed the names of copyright holders in the license text to 'THE COPYRIGHT HOLDERS'
  and cleaned up formatting in the existing BSD-style license.
- For Makefiles and the following files in WebCore/platform/graphics/android/, I've changed from an
  Apache 2.0 license to the BSD-style license.
  - WebCore/platform/graphics/android/BitmapAllocatorAndroid.cpp
  - WebCore/platform/graphics/android/BitmapAllocatorAndroid.h
  - WebCore/platform/graphics/android/SharedBufferStream.cpp
  - WebCore/platform/graphics/android/SharedBufferStream.h
- For the following files, I've changed from an LGPL licese to the BSD-style license.
  - WebCore/platform/graphics/android/FontPlatformData.h
  - WebCore/platform/graphics/android/FontPlatformDataAndroid.cpp
  - WebCore/plugins/android/PluginDataAndroid.cpp

Change-Id: Ic4c3e5610afc58637b7a9b81b1d0d1f17f4f4cb1