Rename getDataEnabled() to isDataEnabled().

The old API is reverted back to @SystemApi and marked deprecated to
avoid breaking any compilation.

Also clean up the Javadoc by making the permissions requirements
clearer and noting that this API does not take per-app data
restrictions into account.

Merged-In: I5baacc1fd7e75d54e1d6521c24f792f427d9e228
Change-Id: I5baacc1fd7e75d54e1d6521c24f792f427d9e228
Test: TreeHugger build/boot
Fixes: 35766530
diff --git a/api/current.txt b/api/current.txt
index 5d968be..38c9879 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -38180,7 +38180,6 @@
     method public android.os.PersistableBundle getCarrierConfig();
     method public deprecated android.telephony.CellLocation getCellLocation();
     method public int getDataActivity();
-    method public boolean getDataEnabled();
     method public int getDataNetworkType();
     method public int getDataState();
     method public deprecated java.lang.String getDeviceId();
@@ -38225,6 +38224,7 @@
     method public java.lang.String iccTransmitApduBasicChannel(int, int, int, int, int, java.lang.String);
     method public java.lang.String iccTransmitApduLogicalChannel(int, int, int, int, int, int, java.lang.String);
     method public boolean isConcurrentVoiceAndDataAllowed();
+    method public boolean isDataEnabled();
     method public boolean isHearingAidCompatibilitySupported();
     method public boolean isNetworkRoaming();
     method public boolean isSmsCapable();
diff --git a/api/system-current.txt b/api/system-current.txt
index f336cdb..cbe7507 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -41393,8 +41393,8 @@
     method public int getCurrentPhoneType();
     method public int getCurrentPhoneType(int);
     method public int getDataActivity();
-    method public boolean getDataEnabled();
-    method public boolean getDataEnabled(int);
+    method public deprecated boolean getDataEnabled();
+    method public deprecated boolean getDataEnabled(int);
     method public int getDataNetworkType();
     method public int getDataState();
     method public deprecated java.lang.String getDeviceId();
@@ -41443,6 +41443,7 @@
     method public java.lang.String iccTransmitApduLogicalChannel(int, int, int, int, int, int, java.lang.String);
     method public boolean isConcurrentVoiceAndDataAllowed();
     method public boolean isDataConnectivityPossible();
+    method public boolean isDataEnabled();
     method public boolean isHearingAidCompatibilitySupported();
     method public boolean isIdle();
     method public boolean isNetworkRoaming();
diff --git a/api/test-current.txt b/api/test-current.txt
index 65cfd84..dbed400 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -38279,7 +38279,6 @@
     method public android.os.PersistableBundle getCarrierConfig();
     method public deprecated android.telephony.CellLocation getCellLocation();
     method public int getDataActivity();
-    method public boolean getDataEnabled();
     method public int getDataNetworkType();
     method public int getDataState();
     method public deprecated java.lang.String getDeviceId();
@@ -38324,6 +38323,7 @@
     method public java.lang.String iccTransmitApduBasicChannel(int, int, int, int, int, java.lang.String);
     method public java.lang.String iccTransmitApduLogicalChannel(int, int, int, int, int, int, java.lang.String);
     method public boolean isConcurrentVoiceAndDataAllowed();
+    method public boolean isDataEnabled();
     method public boolean isHearingAidCompatibilitySupported();
     method public boolean isNetworkRoaming();
     method public boolean isSmsCapable();
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 5a848d9..d751fcb 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -5257,23 +5257,42 @@
         }
     }
 
+
+    /**
+     * @deprecated use {@link #isDataEnabled()} instead.
+     * @hide
+     */
+    @SystemApi
+    @Deprecated
+    public boolean getDataEnabled() {
+        return isDataEnabled();
+    }
+
     /**
      * Returns whether mobile data is enabled or not.
      *
-     * <p>Requires Permission:
-     *     {@link android.Manifest.permission#ACCESS_NETWORK_STATE ACCESS_NETWORK_STATE},
-     *     {@link android.Manifest.permission#MODIFY_PHONE_STATE MODIFY_PHONE_STATE}, or that the
-     *     calling app has carrier privileges.
+     * <p>Requires one of the following permissions:
+     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE ACCESS_NETWORK_STATE},
+     * {@link android.Manifest.permission#MODIFY_PHONE_STATE MODIFY_PHONE_STATE}, or that the
+     * calling app has carrier privileges.
+     *
+     * <p>Note that this does not take into account any data restrictions that may be present on the
+     * calling app. Such restrictions may be inspected with
+     * {@link ConnectivityManager#getRestrictBackgroundStatus}.
      *
      * @return true if mobile data is enabled.
      *
      * @see #hasCarrierPrivileges
      */
-    public boolean getDataEnabled() {
+    @SuppressWarnings("deprecation")
+    public boolean isDataEnabled() {
         return getDataEnabled(getSubId());
     }
 
-    /** @hide */
+    /**
+     * @deprecated use {@link #isDataEnabled(int)} instead.
+     * @hide
+     */
     @SystemApi
     public boolean getDataEnabled(int subId) {
         boolean retVal = false;