add more android.text.style.*Span classes

src/api-impl/android/text/style/BackgroundColorSpan.java

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+package android.text.style;
+
+public class BackgroundColorSpan {
+	public BackgroundColorSpan(int color) {}
+}

src/api-impl/android/text/style/BulletSpan.java

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+package android.text.style;
+
+public class BulletSpan {
+	public BulletSpan(int gapWidth) {}
+}

src/api-impl/android/text/style/LeadingMarginSpan.java

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+package android.text.style;
+
+public interface LeadingMarginSpan {}

src/api-impl/android/text/style/LineBackgroundSpan.java

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+package android.text.style;
+
+public interface LineBackgroundSpan {
+}

src/api-impl/android/text/style/LineHeightSpan.java

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+package android.text.style;
+
+public interface LineHeightSpan {
+}

src/api-impl/android/text/style/ParagraphStyle.java

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+package android.text.style;
+
+public class ParagraphStyle {
+}

src/api-impl/android/text/style/RelativeSizeSpan.java

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+package android.text.style;
+
+public class RelativeSizeSpan {
+	public RelativeSizeSpan(float proportion) {}
+}

src/api-impl/android/text/style/ReplacementSpan.java

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+package android.text.style;
+
+public class ReplacementSpan {
+}

src/api-impl/android/text/style/TypefaceSpan.java

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+package android.text.style;
+
+public class TypefaceSpan {
+	public TypefaceSpan(String typeface) {}
+}