sdk: Add static isChargingControlSupported(ctx) method

This will let us use it without bothering to handle RuntimeException
from HealthInterface contructor.

Change-Id: I768c250d1e527b6fd8e49a40452b98404062cc18
diff --git a/sdk/src/omnirom/health/HealthInterface.java b/sdk/src/omnirom/health/HealthInterface.java
index 3a8e787..4589285 100644
--- a/sdk/src/omnirom/health/HealthInterface.java
+++ b/sdk/src/omnirom/health/HealthInterface.java
@@ -120,6 +120,21 @@
     }
 
     /**
+     * Returns whether charging control is supported
+     *
+     * @return true if charging control is supported
+     */
+    public static boolean isChargingControlSupported(Context context) {
+        try {
+            return getInstance(context).isChargingControlSupported();
+        } catch (RuntimeException e) {
+            Log.e(TAG, e.getLocalizedMessage(), e);
+        }
+
+        return false;
+    }
+
+    /**
      * Returns the charging control enabled status
      *
      * @return whether charging control has been enabled