Link card improvements (AND-115)

closes #651

mastodon/src/main/res/values/attrs.xml

@@ -54,4 +54,9 @@
 		<attr name="android:verticalGap" format="dimension"/>
 		<attr name="android:horizontalGap" format="dimension"/>
 	</declare-styleable>
+
+	<declare-styleable name="FixedAspectRatioImageView">
+		<attr name="aspectRatio" format="float"/>
+		<attr name="useHeight" format="boolean"/>
+	</declare-styleable>
 </resources>

mastodon/src/main/res/values/strings.xml

@@ -665,4 +665,5 @@
 	<string name="app_version_copied">Version number copied to clipboard</string>
 	<string name="onboarding_recommendations_intro">You curate your own home feed.
The more people you follow, the more active and interesting it will be.</string>
 	<string name="onboarding_recommendations_title">Personalize your home feed</string>
+	<string name="article_by_author">By %s</string>
 </resources>

mastodon/src/main/res/values/styles.xml

@@ -375,6 +375,7 @@
 	<style name="m3_body_medium">
 		<item name="android:textSize">14dp</item>
 		<item name="android:lineSpacingExtra">4dp</item>
+		<item name="android:lineHeight">20dp</item>
 	</style>
 
 	<style name="m3_body_small">
@@ -386,6 +387,7 @@
 		<item name="android:fontFamily">sans-serif-medium</item>
 		<item name="android:textSize">16dp</item>
 		<item name="android:lineSpacingExtra">5dp</item>
+		<item name="android:lineHeight">24dp</item>
 	</style>
 
 	<style name="m3_title_small">