Update r8 min sdk version to 19

PiperOrigin-RevId: 596676516
Change-Id: I0c60aa371c9ee99d27e47e5b75480e881b5e9da2

Author: cushon

src/tools/android/java/com/google/devtools/build/android/r8/CompatDx.java

@@ -313,7 +313,7 @@ public static class Options extends OptionsBase {
 
     @Option(
         name = "min-sdk-version",
-        defaultValue = "13", // Same as Constants.MIN_API_LEVEL.
+        defaultValue = "19", // Same as Constants.MIN_API_LEVEL.
         documentationCategory = OptionDocumentationCategory.UNCATEGORIZED,
         effectTags = {OptionEffectTag.UNKNOWN},
         allowMultiple = false,

src/tools/android/java/com/google/devtools/build/android/r8/Constants.java

@@ -18,7 +18,7 @@ public class Constants {
   // When changing this also change the defaultValue for min-sdk-version in CompatDx.java,
   // CoreLibraryDesugaring and Desugar.java. The defaultValue for annotation parameters must be
   // compile time constants, and a "public final String" value is rejected.
-  public static final int MIN_API_LEVEL = 13;
+  public static final int MIN_API_LEVEL = 19;
 
   private Constants() {}
 }

src/tools/android/java/com/google/devtools/build/android/r8/CoreLibraryDesugar.java

@@ -100,7 +100,7 @@ public static class DesugarOptions extends OptionsBase {
 
     @Option(
         name = "min_sdk_version",
-        defaultValue = "13", // Same as Constants.MIN_API_LEVEL.
+        defaultValue = "19", // Same as Constants.MIN_API_LEVEL.
         category = "misc",
         documentationCategory = OptionDocumentationCategory.UNCATEGORIZED,
         effectTags = {OptionEffectTag.UNKNOWN},

src/tools/android/java/com/google/devtools/build/android/r8/Desugar.java

@@ -158,7 +158,7 @@ public static class DesugarOptions extends OptionsBase {
 
     @Option(
         name = "min_sdk_version",
-        defaultValue = "13", // Same as Constants.MIN_API_LEVEL.
+        defaultValue = "19", // Same as Constants.MIN_API_LEVEL.
         category = "misc",
         documentationCategory = OptionDocumentationCategory.UNCATEGORIZED,
         effectTags = {OptionEffectTag.UNKNOWN},